Enter a species  (e.g. Al, Fe): Yb
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): 3.637384932770288e-10, 5.939943239972205e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -2.171684
         Iterations: 72
         Function evaluations: 185

Finished calculation

C11 = 81.29028719666637 GPa
C12 = 21.75592992515387 GPa
  B = 41.600715682324704 GPa