Enter a species  (e.g. Al, Fe): Ar
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: LJ_Shifted_Bernardes_1958LowCutoff_Ar__MO_720819638419_004
Enter hexagonal lattice constants 'a' and 'c' (m): 3.7235044009243e-10, 6.083721878524124e-10