element: Rb lattice type: fcc modelname: EAM_Dynamo_NicholAckland_2016v2_Rb__MO_874930365376_000 Attempting to perform relaxation using initial lattice constant guess of 2.5 Angstroms Optimization terminated successfully. Current function value: -3.310235 Iterations: 33 Function evaluations: 69 {'lattice_constant': 7.083943605422974, 'cohesive_energy': 0.8275587694453258, 'element': 'Rb', 'species': 'Rb" "Rb" "Rb" "Rb', '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': 33, 'func_calls': 69, 'warnflag': 0, 'repeat': 0}