Enter a species  (e.g. Al, Fe): Po
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): 2.723180789873808e-10, 4.447024296242929e-10

Calculating isothermal bulk modulus

Optimization terminated successfully.
         Current function value: -31.635058
         Iterations: 75
         Function evaluations: 194

Finished calculation

C11 = 2821.94754714089 GPa
C12 = 755.2451610263001 GPa
  B = 1444.14595639783 GPa