Enter a species  (e.g. Al, Fe): W
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: Morse_Shifted_GirifalcoWeizer_1959MedCutoff_W__MO_390128289865_003
Enter hexagonal lattice constants 'a' and 'c' (m): 2.81046350790283e-10, 4.586081608404041e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -17.663225
         Iterations: 75
         Function evaluations: 197

Finished calculation

C11 = 671.6449265484017 GPa
C12 = 169.14764632032995 GPa
  B = 336.64673972968717 GPa