Enter a species  (e.g. Al, Fe): Si
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: Tersoff_LAMMPS_Tersoff_1988T2_Si__MO_245095684871_002
Enter hexagonal lattice constants 'a' and 'c' (m): 2.728935803833749e-10, 4.461827702484433e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -8.158474
         Iterations: 72
         Function evaluations: 191

Finished calculation

C11 = 304.7334348766108 GPa
C12 = 89.97636944665139 GPa
  B = 161.5620579233045 GPa