element: Ar lattice type: fcc modelname: LJ_Shifted_Bernardes_1958LowCutoff_Ar__MO_720819638419_003 Attempting to perform relaxation using initial lattice constant guess of 2.5 Angstroms Optimization terminated successfully. Current function value: -0.320890 Iterations: 32 Function evaluations: 66 {'lattice_constant': 5.266347639262676, 'cohesive_energy': 0.08022257030270852, 'element': 'Ar', 'species': 'Ar" "Ar" "Ar" "Ar', '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}