Enter a species  (e.g. Al, Fe): Zr
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: LJ_ElliottAkerson_2015_Universal__MO_959249795837_003
Enter hexagonal lattice constants 'a' and 'c' (m): 3.403976001030378e-10, 5.558780312723561e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -50.828639
         Iterations: 72
         Function evaluations: 186

Finished calculation

C11 = 2321.4465857090167 GPa
C12 = 621.2948291473637 GPa
  B = 1188.0120813345814 GPa