Enter a species (e.g. Al, Fe): Cu Enter a hexagonal lattice type (e.g. hcp): hcp Enter a model name: Morse_Shifted_GirifalcoWeizer_1959MedCutoff_Cu__MO_173787283511_004 Enter hexagonal lattice constants 'a' and 'c' (m): 2.554536138791302e-10, 4.172096998545641e-10