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_003
Enter hexagonal lattice constants 'a' and 'c' (m): 3.931034806556033e-10, 6.421142158513143e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -3.712332
         Iterations: 73
         Function evaluations: 186

Finished calculation

C11 = 34.49538319752311 GPa
C12 = 8.288034891725408 GPa
  B = 17.023817660324642 GPa