Enter a species (e.g. Al, Fe): Pb Enter a hexagonal lattice type (e.g. hcp): hcp Enter a model name: Morse_Shifted_GirifalcoWeizer_1959LowCutoff_Pb__MO_534638645497_004 Enter hexagonal lattice constants 'a' and 'c' (m): 3.508523858781261e-10, 5.739574736645464e-10