element: C lattice type: fcc modelname: Sim_LAMMPS_AIREBO_Morse_OConnorAndzelmRobbins_2015_CH__SM_460187474631_000 Attempting to perform relaxation using initial lattice constant guess of 2.5 Angstroms Optimization terminated successfully. Current function value: -11.740243 Iterations: 29 Function evaluations: 58 {'lattice_constant': 2.6981616020202637, 'cohesive_energy': 2.9350607918840947, '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': 29, 'func_calls': 58, 'warnflag': 0, 'repeat': 0}