Enter a species  (e.g. Al, Fe): Cu
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: Morse_Shifted_GirifalcoWeizer_1959HighCutoff_Cu__MO_151002396060_003
Enter hexagonal lattice constants 'a' and 'c' (m): 2.550696953109428e-10, 4.16585845048141e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -7.069487
         Iterations: 70
         Function evaluations: 181

Finished calculation

C11 = 281.83760687626653 GPa
C12 = 68.65884646957545 GPa
  B = 139.7184332718058 GPa