Enter a species  (e.g. Al, Fe): Sn
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: MEAM_LAMMPS_KimJeonLee_2015_MgSn__MO_935641703527_002
Enter hexagonal lattice constants 'a' and 'c' (m): 3.439772539539263e-10, 5.617125035405779e-10