Enter a species  (e.g. Al, Fe): Si
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: SW_StillingerWeber_1985_Si__MO_405512056662_006
Enter hexagonal lattice constants 'a' and 'c' (m): 3.647017575639143e-10, 3.224000195468848e-10