element: C lattice type: bcc modelname: Tersoff_LAMMPS_Tersoff_1988_C__MO_579868029681_003 Detected that energy at a lattice constant of 2.5 Angstroms was equal to the isolated energy (i.e. no interactions). Shrinking box until energy becomes non-trivial... Attempting to perform relaxation using initial lattice constant guess of 1.25 Angstroms Optimization terminated successfully. Current function value: -7.249141 Iterations: 30 Function evaluations: 60 {'lattice_constant': 2.1520568430423737, 'cohesive_energy': 3.624570705636167, 'element': 'C', 'species': 'C" "C', 'crystal_structure': 'bcc', 'space_group': 'Im-3m', 'wyckoff_code': '2a', 'basis_atoms': '[[0.0 0.0 0.0] [0.5 0.5 0.5]]', 'iterations': 30, 'func_calls': 60, 'warnflag': 0, 'repeat': 0}