Enter a species  (e.g. Al, Fe): Na
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: MEAM_LAMMPS_KimKoLee_2020_NaSn__MO_329881861557_001
Enter hexagonal lattice constants 'a' and 'c' (m): 3.743716689649134e-10, 6.134241766343255e-10