Enter a species  (e.g. Al, Fe): Cu
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): 2.567563878092125e-10, 4.192897926092811e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -34.051583
         Iterations: 72
         Function evaluations: 191

Finished calculation

C11 = 3623.958005150828 GPa
C12 = 969.8892507687877 GPa
  B = 1854.578835562801 GPa