Enter a species (e.g. Al, Fe): Ni Enter a hexagonal lattice type (e.g. hcp): hcp Enter a model name: MEAM_LAMMPS_WuLeeSu_2017_NiCr__MO_880803040302_002 Enter hexagonal lattice constants 'a' and 'c' (m): 2.491371905803683e-10, 4.0683932858162e-10