Enter a species (e.g. Al, Fe): Ca Enter a hexagonal lattice type (e.g. hcp): hcp Enter a model name: Morse_Shifted_GirifalcoWeizer_1959HighCutoff_Ca__MO_159753408472_004 Enter hexagonal lattice constants 'a' and 'c' (m): 3.931034806556033e-10, 6.421142158513143e-10