Enter a species  (e.g. Al, Fe): Si
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: SW_LeeHwang_2012LDA_Si__MO_517338295712_000
Enter hexagonal lattice constants 'a' and 'c' (m): 3.669511330075927e-10, 3.259126969974608e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -5.050765
         Iterations: 71
         Function evaluations: 185

Finished calculation

C11 = 319.3963265060866 GPa
C12 = 167.3781253260045 GPa
  B = 218.0508590526985 GPa