Enter a species  (e.g. Al, Fe): Si
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: SW_StillingerWeber_1985_Si__MO_405512056662_005
Enter hexagonal lattice constants 'a' and 'c' (m): 3.647017573107439e-10, 3.224000198444323e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -8.071726
         Iterations: 73
         Function evaluations: 185

Finished calculation

C11 = 445.4308754720212 GPa
C12 = 241.8802792844173 GPa
  B = 309.7304780136186 GPa