element: C lattice type: fcc modelname: DUNN_WenTadmor_2019v3_C__MO_714772088128_000 Attempting to perform relaxation using initial lattice constant guess of 2.5 Angstroms Optimization terminated successfully. Current function value: -0.276442 Iterations: 27 Function evaluations: 58 {'lattice_constant': 2.402542233467102, 'cohesive_energy': 0.06911048941237574, 'element': 'C', 'species': 'C" "C" "C" "C', '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': 27, 'func_calls': 58, 'warnflag': 0, 'repeat': 0}