Enter a species (e.g. Al, Fe): Si Enter a hexagonal lattice type (e.g. hcp): hcp Enter a model name: MEAM_LAMMPS_CuiGaoCui_2012_LiSi__MO_557492625287_002 Enter hexagonal lattice constants 'a' and 'c' (m): 2.793269405723549e-10, 4.561389838766598e-10