element: O lattice type: bcc modelname: Tersoff_LAMMPS_ErhartJuslinGoy_2006_ZnO__MO_616776018688_002 Attempting to perform relaxation using initial lattice constant guess of 2.5 Angstroms Optimization terminated successfully. Current function value: -0.683989 Iterations: 25 Function evaluations: 50 {'lattice_constant': 2.6891717985272408, 'cohesive_energy': 0.34199435843528786, 'element': 'O', 'species': 'O" "O', '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': 25, 'func_calls': 50, 'warnflag': 0, 'repeat': 0}