element:
Ca
lattice type:
fcc
modelname:
Morse_Shifted_GirifalcoWeizer_1959MedCutoff_Ca__MO_562200212426_004

Attempting to perform relaxation using initial lattice constant guess of 2.5 Angstroms


Failed to perform relaxation using initial lattice constant guess of 2.5 Angstroms
Exception message:
Attempted to evaluate energy at lattice spacing ([2.5]) below the minimum allowed value (2.5212060004927292).  This may mean that the model does not possess close-range repulsive forces to prevent system collapse.


Attempting to perform relaxation using initial lattice constant guess of 3.0 Angstroms

Optimization terminated successfully.
         Current function value: -7.328815
         Iterations: 31
         Function evaluations: 64
{'lattice_constant': 5.572151345014578, 'cohesive_energy': 1.832203744145644, 'element': 'Ca', 'species': 'Ca" "Ca" "Ca" "Ca', 'crystal_structure': 'fcc', 'space_group': 'Fm-3m', 'wyckoff_code': '4a', 'basis_atoms': '[[0.0 0.0 0.0] [0.5 0.5 0.0] [0.5 0.0 0.5] [0.0 0.5 0.5]]', 'iterations': 31, 'func_calls': 64, 'warnflag': 0, 'repeat': 0}