Enter a species  (e.g. Al, Fe): Ga
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: SW_BereSerra_2006_GaN__MO_861114678890_000
Enter hexagonal lattice constants 'a' and 'c' (m): 2.636839574063196e-10, 4.305940993355042e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -2.874015
         Iterations: 74
         Function evaluations: 190

Finished calculation

C11 = 630.2347995838971 GPa
C12 = 462.45477839848564 GPa
  B = 518.3814521269561 GPa