Enter a species  (e.g. Al, Fe): K
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): 3.948607768898617e-10, 6.448178101462521e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -9.189745
         Iterations: 71
         Function evaluations: 184

Finished calculation

C11 = 268.89401932811796 GPa
C12 = 71.9648051047194 GPa
  B = 137.6078765125189 GPa