Enter a species (e.g. Al, Fe): Sn Enter a hexagonal lattice type (e.g. hcp): hcp Enter a model name: MEAM_LAMMPS_KimKoLee_2020_NaSn__MO_329881861557_000 Enter hexagonal lattice constants 'a' and 'c' (m): 4.483347383590939e-10, 3.357040041352597e-10