Enter a species  (e.g. Al, Fe): K
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: Morse_Shifted_GirifalcoWeizer_1959LowCutoff_K__MO_749732139672_003
Enter hexagonal lattice constants 'a' and 'c' (m): 4.770868069039318e-10, 7.759705196618627e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -1.671693
         Iterations: 70
         Function evaluations: 186

Finished calculation

C11 = 6.129442345904863 GPa
C12 = 1.5019646951537695 GPa
  B = 3.044457245404134 GPa