Enter a species  (e.g. Al, Fe): Si
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: Sim_LAMMPS_ModifiedTersoff_KumagaiIzumiHara_2007_Si__SM_773333226968_000
Enter hexagonal lattice constants 'a' and 'c' (m): 2.717911579665043e-10, 4.456970813036562e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -8.374914
         Iterations: 72
         Function evaluations: 189

Finished calculation

C11 = 217.79337451323087 GPa
C12 = 156.1521441727472 GPa
  B = 176.6992209529084 GPa