Enter a species  (e.g. Al, Fe): Ir
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): 2.742623338583516e-10, 4.478774438766601e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -61.668148
         Iterations: 70
         Function evaluations: 178

Finished calculation

C11 = 5384.831869038229 GPa
C12 = 1441.1566072096919 GPa
  B = 2755.7150278192044 GPa