Element = Lattice = Model = Element: Rb
Lattice: hcp
Model: LJ_ElliottAkerson_2015_Universal__MO_959249795837_003
Computed model cutoff of 15.679800000488765 Angstroms
Computed isolated atomic energy of 0.0 eV for species Rb

==============================================================================
==============================================================================
 Starting optimization to find optimum lattice constant 'a' with c/a fixed to
 sqrt(8/3)
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = 1.0 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 1.0 Angstroms
Exception message:
Attempted to evaluate energy at a = 1.0 Angstroms and c = 1.632993161855452 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 1.125 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 1.125 Angstroms
Exception message:
Attempted to evaluate energy at a = 1.125 Angstroms and c = 1.8371173070873836 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 1.25 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 1.25 Angstroms
Exception message:
Attempted to evaluate energy at a = 1.25 Angstroms and c = 2.041241452319315 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 1.375 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 1.375 Angstroms
Exception message:
Attempted to evaluate energy at a = 1.375 Angstroms and c = 2.2453655975512468 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 1.5 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 1.5 Angstroms
Exception message:
Attempted to evaluate energy at a = 1.5 Angstroms and c = 2.449489742783178 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 1.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 4.279301634128209, total energy = -15.597113124603558

Attempting to perform relaxation using initial lattice constant guess of a = 1.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 4.279301634058355, total energy = -15.597113124603622

Attempting to perform relaxation using initial lattice constant guess of a = 1.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.279301634058356, total energy = -15.597113124603624

Attempting to perform relaxation using initial lattice constant guess of a = 2.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 4.279301622509963, total energy = -15.597113124603535

Attempting to perform relaxation using initial lattice constant guess of a = 2.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.279301644768569, total energy = -15.59711312460359

Attempting to perform relaxation using initial lattice constant guess of a = 2.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 89
Results for this minimization:
  a = 4.279301642999052, total energy = -15.597113124603569

Attempting to perform relaxation using initial lattice constant guess of a = 2.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 84
Results for this minimization:
  a = 4.279301652219143, total energy = -15.597113124603556

Attempting to perform relaxation using initial lattice constant guess of a = 2.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 4.279301602393389, total energy = -15.597113124603524

Attempting to perform relaxation using initial lattice constant guess of a = 2.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 39
         Function evaluations: 83
Results for this minimization:
  a = 4.279301593964921, total energy = -15.597113124603515

Attempting to perform relaxation using initial lattice constant guess of a = 2.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 4.27930160015822, total energy = -15.597113124603645

Attempting to perform relaxation using initial lattice constant guess of a = 2.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 85
Results for this minimization:
  a = 4.27930160611868, total energy = -15.597113124603515

Attempting to perform relaxation using initial lattice constant guess of a = 3.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 37
         Function evaluations: 78
Results for this minimization:
  a = 4.279301606747324, total energy = -15.597113124603533

Attempting to perform relaxation using initial lattice constant guess of a = 3.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 36
         Function evaluations: 79
Results for this minimization:
  a = 4.279301594942808, total energy = -15.597113124603494

Attempting to perform relaxation using initial lattice constant guess of a = 3.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 4.279301634128207, total energy = -15.59711312460356

Attempting to perform relaxation using initial lattice constant guess of a = 3.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 4.279301642999057, total energy = -15.597113124603576

Attempting to perform relaxation using initial lattice constant guess of a = 3.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 35
         Function evaluations: 75
Results for this minimization:
  a = 4.279301634058355, total energy = -15.59711312460363

Attempting to perform relaxation using initial lattice constant guess of a = 3.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 34
         Function evaluations: 72
Results for this minimization:
  a = 4.279301634430888, total energy = -15.597113124603526

Attempting to perform relaxation using initial lattice constant guess of a = 3.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 34
         Function evaluations: 74
Results for this minimization:
  a = 4.279301634058356, total energy = -15.597113124603622

Attempting to perform relaxation using initial lattice constant guess of a = 3.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 33
         Function evaluations: 71
Results for this minimization:
  a = 4.2793016270268724, total energy = -15.597113124603618

Attempting to perform relaxation using initial lattice constant guess of a = 4.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 32
         Function evaluations: 68
Results for this minimization:
  a = 4.279301628470422, total energy = -15.597113124603576

Attempting to perform relaxation using initial lattice constant guess of a = 4.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 33
         Function evaluations: 74
Results for this minimization:
  a = 4.279301582230255, total energy = -15.597113124603496

Attempting to perform relaxation using initial lattice constant guess of a = 4.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 32
         Function evaluations: 70
Results for this minimization:
  a = 4.279301644768567, total energy = -15.597113124603583

Attempting to perform relaxation using initial lattice constant guess of a = 4.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 33
         Function evaluations: 70
Results for this minimization:
  a = 4.279301599832252, total energy = -15.597113124603542

Attempting to perform relaxation using initial lattice constant guess of a = 4.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 35
         Function evaluations: 79
Results for this minimization:
  a = 4.279301642999052, total energy = -15.597113124603577

Attempting to perform relaxation using initial lattice constant guess of a = 4.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 35
         Function evaluations: 76
Results for this minimization:
  a = 4.279301562439651, total energy = -15.597113124603503

Attempting to perform relaxation using initial lattice constant guess of a = 4.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 35
         Function evaluations: 78
Results for this minimization:
  a = 4.2793016522191465, total energy = -15.597113124603576

Attempting to perform relaxation using initial lattice constant guess of a = 4.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 4.279301593720446, total energy = -15.597113124603506

Attempting to perform relaxation using initial lattice constant guess of a = 5.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 35
         Function evaluations: 74
Results for this minimization:
  a = 4.279301602393389, total energy = -15.59711312460352

Attempting to perform relaxation using initial lattice constant guess of a = 5.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 36
         Function evaluations: 77
Results for this minimization:
  a = 4.279301629774273, total energy = -15.597113124603524

Attempting to perform relaxation using initial lattice constant guess of a = 5.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 4.2793015937204455, total energy = -15.597113124603505

Attempting to perform relaxation using initial lattice constant guess of a = 5.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 4.2793016305804485, total energy = -15.59711312460357

Attempting to perform relaxation using initial lattice constant guess of a = 5.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 36
         Function evaluations: 78
Results for this minimization:
  a = 4.279301600158211, total energy = -15.597113124603617

Attempting to perform relaxation using initial lattice constant guess of a = 5.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 4.27930160703545, total energy = -15.597113124603595

Attempting to perform relaxation using initial lattice constant guess of a = 5.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 37
         Function evaluations: 79
Results for this minimization:
  a = 4.279301612544802, total energy = -15.597113124603611

Attempting to perform relaxation using initial lattice constant guess of a = 5.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 4.279301628470419, total energy = -15.597113124603565

Attempting to perform relaxation using initial lattice constant guess of a = 6.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 80
Results for this minimization:
  a = 4.279301606747317, total energy = -15.597113124603549

Attempting to perform relaxation using initial lattice constant guess of a = 6.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.279301634058353, total energy = -15.597113124603613

Attempting to perform relaxation using initial lattice constant guess of a = 6.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.2793016077484936, total energy = -15.597113124603572

Attempting to perform relaxation using initial lattice constant guess of a = 6.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 83
Results for this minimization:
  a = 4.2793016558513015, total energy = -15.597113124603545

Attempting to perform relaxation using initial lattice constant guess of a = 6.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.279301634430881, total energy = -15.597113124603556

Attempting to perform relaxation using initial lattice constant guess of a = 6.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 37
         Function evaluations: 80
Results for this minimization:
  a = 4.279301623348142, total energy = -15.597113124603524

Attempting to perform relaxation using initial lattice constant guess of a = 6.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 4.279301642999052, total energy = -15.597113124603586

Attempting to perform relaxation using initial lattice constant guess of a = 6.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 4.279301588248927, total energy = -15.597113124603542

Attempting to perform relaxation using initial lattice constant guess of a = 7.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 4.279301634058354, total energy = -15.597113124603615

Attempting to perform relaxation using initial lattice constant guess of a = 7.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.279301636293526, total energy = -15.597113124603489

Attempting to perform relaxation using initial lattice constant guess of a = 7.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 4.2793016344308805, total energy = -15.597113124603542

Attempting to perform relaxation using initial lattice constant guess of a = 7.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.279301600903269, total energy = -15.597113124603561

Attempting to perform relaxation using initial lattice constant guess of a = 7.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 4.279301634058356, total energy = -15.59711312460362

Attempting to perform relaxation using initial lattice constant guess of a = 7.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 4.2793016303330695, total energy = -15.597113124603522

Attempting to perform relaxation using initial lattice constant guess of a = 7.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 39
         Function evaluations: 84
Results for this minimization:
  a = 4.279301627026862, total energy = -15.597113124603586

Attempting to perform relaxation using initial lattice constant guess of a = 7.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 81
Results for this minimization:
  a = 4.279301593964913, total energy = -15.597113124603483

Attempting to perform relaxation using initial lattice constant guess of a = 8.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 4.279301634058353, total energy = -15.59711312460362

Attempting to perform relaxation using initial lattice constant guess of a = 8.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 4.279301649716217, total energy = -15.597113124603524

Attempting to perform relaxation using initial lattice constant guess of a = 8.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 39
         Function evaluations: 85
Results for this minimization:
  a = 4.279301582230259, total energy = -15.597113124603494

Attempting to perform relaxation using initial lattice constant guess of a = 8.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.279301637411108, total energy = -15.597113124603565

Attempting to perform relaxation using initial lattice constant guess of a = 8.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 38
         Function evaluations: 82
Results for this minimization:
  a = 4.279301655851299, total energy = -15.597113124603524

Attempting to perform relaxation using initial lattice constant guess of a = 8.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 4.279301612544801, total energy = -15.59711312460361

Attempting to perform relaxation using initial lattice constant guess of a = 8.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 84
Results for this minimization:
  a = 4.279301599832252, total energy = -15.597113124603515

Attempting to perform relaxation using initial lattice constant guess of a = 8.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.2793016309122365, total energy = -15.597113124603576

Attempting to perform relaxation using initial lattice constant guess of a = 9.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 89
Results for this minimization:
  a = 4.279301642999041, total energy = -15.59711312460355

Attempting to perform relaxation using initial lattice constant guess of a = 9.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.2793016232084415, total energy = -15.597113124603547

Attempting to perform relaxation using initial lattice constant guess of a = 9.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.279301562439647, total energy = -15.5971131246035

Attempting to perform relaxation using initial lattice constant guess of a = 9.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 4.279301617643796, total energy = -15.59711312460352

Attempting to perform relaxation using initial lattice constant guess of a = 9.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 4.27930165221915, total energy = -15.597113124603586

Attempting to perform relaxation using initial lattice constant guess of a = 9.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.2793016001582025, total energy = -15.597113124603613

Attempting to perform relaxation using initial lattice constant guess of a = 9.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 39
         Function evaluations: 82
Results for this minimization:
  a = 4.279301593720439, total energy = -15.597113124603503

Attempting to perform relaxation using initial lattice constant guess of a = 9.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 4.279301646107338, total energy = -15.597113124603576

Attempting to perform relaxation using initial lattice constant guess of a = 10.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 4.279301602393389, total energy = -15.59711312460352

Attempting to perform relaxation using initial lattice constant guess of a = 10.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 4.27930165730068, total energy = -15.597113124603545

Attempting to perform relaxation using initial lattice constant guess of a = 10.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 86
Results for this minimization:
  a = 4.27930163788841, total energy = -15.59711312460355

Attempting to perform relaxation using initial lattice constant guess of a = 10.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 4.2793016045528836, total energy = -15.597113124603554

Attempting to perform relaxation using initial lattice constant guess of a = 10.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 42
         Function evaluations: 89
Results for this minimization:
  a = 4.279301593720442, total energy = -15.597113124603505

Attempting to perform relaxation using initial lattice constant guess of a = 10.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 4.279301573027624, total energy = -15.597113124603478

Attempting to perform relaxation using initial lattice constant guess of a = 10.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 4.279301630580452, total energy = -15.59711312460357

Attempting to perform relaxation using initial lattice constant guess of a = 10.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 90
Results for this minimization:
  a = 4.279301624977947, total energy = -15.59711312460352

Attempting to perform relaxation using initial lattice constant guess of a = 11.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 85
Results for this minimization:
  a = 4.279301600158204, total energy = -15.597113124603604

Attempting to perform relaxation using initial lattice constant guess of a = 11.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 4.279301582535841, total energy = -15.59711312460354

Attempting to perform relaxation using initial lattice constant guess of a = 11.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 4.27930160703545, total energy = -15.597113124603592

Attempting to perform relaxation using initial lattice constant guess of a = 11.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 42
         Function evaluations: 90
Results for this minimization:
  a = 4.279301615967418, total energy = -15.597113124603538

Attempting to perform relaxation using initial lattice constant guess of a = 11.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 40
         Function evaluations: 87
Results for this minimization:
  a = 4.279301606118666, total energy = -15.597113124603487

Attempting to perform relaxation using initial lattice constant guess of a = 11.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 4.279301628470412, total energy = -15.597113124603554

Attempting to perform relaxation using initial lattice constant guess of a = 11.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 89
Results for this minimization:
  a = 4.279301628743991, total energy = -15.597113124603572

Attempting to perform relaxation using initial lattice constant guess of a = 11.875 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 42
         Function evaluations: 89
Results for this minimization:
  a = 4.279301629961992, total energy = -15.597113124603561

Attempting to perform relaxation using initial lattice constant guess of a = 12.0 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 43
         Function evaluations: 92
Results for this minimization:
  a = 4.279301638528686, total energy = -15.597113124603558

Attempting to perform relaxation using initial lattice constant guess of a = 12.125 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 42
         Function evaluations: 90
Results for this minimization:
  a = 4.27930160392861, total energy = -15.597113124603524

Attempting to perform relaxation using initial lattice constant guess of a = 12.25 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 87
Results for this minimization:
  a = 4.279301634058346, total energy = -15.597113124603604

Attempting to perform relaxation using initial lattice constant guess of a = 12.375 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 42
         Function evaluations: 90
Results for this minimization:
  a = 4.27930159606038, total energy = -15.597113124603482

Attempting to perform relaxation using initial lattice constant guess of a = 12.5 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 42
         Function evaluations: 90
Results for this minimization:
  a = 4.279301614733413, total energy = -15.597113124603553

Attempting to perform relaxation using initial lattice constant guess of a = 12.625 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 4.279301590344383, total energy = -15.597113124603485

Attempting to perform relaxation using initial lattice constant guess of a = 12.75 Angstroms (c/a fixed at sqrt(8/3))

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 41
         Function evaluations: 88
Results for this minimization:
  a = 4.2793016558513, total energy = -15.597113124603522

Attempting to perform relaxation using initial lattice constant guess of a = 12.875 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 12.875 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.2875000000000156 Angstroms and c = -2.10247869588892 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 13.0 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 13.0 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3000000000000256 Angstroms and c = -2.1228911104121293 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 13.125 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 13.125 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3125 Angstroms and c = -2.143303524935281 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 13.25 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 13.25 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3250000000000313 Angstroms and c = -2.163715939458525 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 13.375 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 13.375 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3375000000000057 Angstroms and c = -2.1841283539816763 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 13.5 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 13.5 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3500000000000156 Angstroms and c = -2.2045407685048857 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 13.625 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 13.625 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3625000000000256 Angstroms and c = -2.224953183028095 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 13.75 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 13.75 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.375 Angstroms and c = -2.2453655975512468 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 13.875 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 13.875 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.3875000000000313 Angstroms and c = -2.265778012074491 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 14.0 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 14.0 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4000000000000057 Angstroms and c = -2.286190426597642 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 14.125 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 14.125 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4125000000000156 Angstroms and c = -2.3066028411208515 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 14.25 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 14.25 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4250000000000256 Angstroms and c = -2.327015255644061 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 14.375 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 14.375 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4375 Angstroms and c = -2.3474276701672125 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 14.5 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 14.5 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4500000000000313 Angstroms and c = -2.3678400846904566 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 14.625 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 14.625 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4625000000000057 Angstroms and c = -2.388252499213608 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 14.75 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 14.75 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4750000000000156 Angstroms and c = -2.4086649137368172 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 14.875 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 14.875 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.4875000000000256 Angstroms and c = -2.4290773282600266 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 15.0 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 15.0 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.5 Angstroms and c = -2.449489742783178 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 15.125 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 15.125 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.5125000000000313 Angstroms and c = -2.4699021573064224 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 15.25 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 15.25 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.5249999999999844 Angstroms and c = -2.490314571829539 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 15.375 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 15.375 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.5375000000000156 Angstroms and c = -2.510726986352783 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 15.5 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 15.5 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.550000000000047 Angstroms and c = -2.531139400876027 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 15.625 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 15.625 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.5625 Angstroms and c = -2.5515518153991437 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


Attempting to perform relaxation using initial lattice constant guess of a = 15.75 Angstroms (c/a fixed at sqrt(8/3))

Failed to perform relaxation w.r.t. 'a' with c/a fixed at sqrt(8/3) and an initial guess of a = 15.75 Angstroms
Exception message:
Attempted to evaluate energy at a = -1.5750000000000313 Angstroms and c = -2.571964229922388 Angstroms; the model cutoff was estimated to be 15.679800000488765 Angstroms.  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.  In order to prevent possible neighbor list overflow, both a and c must be greater than 0.1 times the model cutoff...
Continuing...


==============================================================================
==============================================================================
 Starting optimization with both a and c/a relaxed
==============================================================================
==============================================================================


Attempting to perform relaxation using initial lattice constant guess of a = [4.2793016] Angstroms and c = 5.590456200460374 = ([1.30639453] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 75
         Function evaluations: 161
Results for this minimization:
  a = 4.2792731311515695, c = 6.988163353799622, total energy = -15.597113151472119

Attempting to perform relaxation using initial lattice constant guess of a = [4.2793016] Angstroms and c = 5.939859712989148 = ([1.38804419] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 72
         Function evaluations: 160
Results for this minimization:
  a = 4.2792731410961675, c = 6.988163176485955, total energy = -15.597113151472119

Attempting to perform relaxation using initial lattice constant guess of a = [4.2793016] Angstroms and c = 6.289263225517922 = ([1.46969385] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 74
         Function evaluations: 156
Results for this minimization:
  a = 4.279273152066722, c = 6.988163220398365, total energy = -15.59711315147217

Attempting to perform relaxation using initial lattice constant guess of a = [4.2793016] Angstroms and c = 6.6386667380466955 = ([1.5513435] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 70
         Function evaluations: 154
Results for this minimization:
  a = 4.279273150488959, c = 6.988163235970989, total energy = -15.597113151472165

Attempting to perform relaxation using initial lattice constant guess of a = [4.2793016] Angstroms and c = 6.988070250575469 = ([1.63299316] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 65
         Function evaluations: 139
Results for this minimization:
  a = 4.279273175895344, c = 6.988163140745387, total energy = -15.597113151472202

Attempting to perform relaxation using initial lattice constant guess of a = [4.2793016] Angstroms and c = 7.337473763104243 = ([1.71464282] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 74
         Function evaluations: 155
Results for this minimization:
  a = 4.279273143220835, c = 6.988163121390747, total energy = -15.59711315147214

Attempting to perform relaxation using initial lattice constant guess of a = [4.2793016] Angstroms and c = 7.686877275633017 = ([1.79629248] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 79
         Function evaluations: 167
Results for this minimization:
  a = 4.2792731660052645, c = 6.988163239817055, total energy = -15.597113151472245

Attempting to perform relaxation using initial lattice constant guess of a = [4.2793016] Angstroms and c = 8.03628078816179 = ([1.87794214] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 77
         Function evaluations: 161
Results for this minimization:
  a = 4.27927313335069, c = 6.988163218623777, total energy = -15.597113151472126

Attempting to perform relaxation using initial lattice constant guess of a = [4.2793016] Angstroms and c = 8.385684300690563 = ([1.95959179] * a) Angstroms

Optimization terminated successfully.
         Current function value: -15.597113
         Iterations: 78
         Function evaluations: 161
Results for this minimization:
  a = 4.279273189812373, c = 6.988163295358604, total energy = -15.597113151472142

==============================================================================
==============================================================================
 Finished with optimization
==============================================================================
==============================================================================

 Final lattice Constants:
   a = 4.2792731660052645 Angstroms, c = 6.988163239817055 Angstroms, c/a = 1.633026

 Total energy: -15.597113151472245 eV

 Cohesive energy: -3.899278287868061 eV/atom

==============================================================================
==============================================================================