element: Pb lattice type: fcc modelname: Morse_Shifted_GirifalcoWeizer_1959HighCutoff_Pb__MO_370271093517_004 Attempting to perform relaxation using initial lattice constant guess of 2.5 Angstroms Optimization terminated successfully. Current function value: -8.140440 Iterations: 32 Function evaluations: 66 {'lattice_constant': 4.935544818639755, 'cohesive_energy': 2.0351100837961615, 'element': 'Pb', 'species': 'Pb" "Pb" "Pb" "Pb', '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': 32, 'func_calls': 66, 'warnflag': 0, 'repeat': 0}