Enter a species  (e.g. Al, Fe): Cr
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: Morse_Shifted_GirifalcoWeizer_1959LowCutoff_Cr__MO_483480726117_002
Enter hexagonal lattice constants 'a' and 'c' (m): 2.575421265716998e-10, 4.214569995030156e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -7.363363
         Iterations: 71
         Function evaluations: 181

Finished calculation

C11 = 392.81379943002656 GPa
C12 = 99.4705476653698 GPa
  B = 197.25163158692206 GPa