element: Rb lattice type: sc modelname: Morse_Shifted_GirifalcoWeizer_1959LowCutoff_Rb__MO_754498969542_004 Attempting to perform relaxation using initial lattice constant guess of 2.5 Angstroms Optimization terminated successfully. Current function value: -0.698735 Iterations: 32 Function evaluations: 65 {'lattice_constant': 4.692384772002697, 'cohesive_energy': 0.6987347446966048, 'element': 'Rb', 'species': 'Rb', 'crystal_structure': 'sc', 'space_group': 'Pm-3m', 'wyckoff_code': '1a', 'basis_atoms': '[[0.0 0.0 0.0]]', 'iterations': 32, 'func_calls': 65, 'warnflag': 0, 'repeat': 0}