Enter a species  (e.g. Al, Fe): Sr
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: Morse_Shifted_GirifalcoWeizer_1959LowCutoff_Sr__MO_801083489225_003
Enter hexagonal lattice constants 'a' and 'c' (m): 4.332641033500158e-10, 7.088397675309118e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -3.203125
         Iterations: 74
         Function evaluations: 192

Finished calculation

C11 = 24.27336086375222 GPa
C12 = 5.958433127785303 GPa
  B = 12.063409039774275 GPa