Enter a species (e.g. Al, Fe): Nb Enter a hexagonal lattice type (e.g. hcp): hcp Enter a model name: MEAM_LAMMPS_LeeBaskesKim_2001_Nb__MO_802302521552_001 Enter hexagonal lattice constants 'a' and 'c' (m): 2.947249887045475e-10, 4.812838911824514e-10