Enter a species  (e.g. Al, Fe): Nb
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): 3.190009607104877e-10, 5.209367795285722e-10

Calculating isothermal bulk modulus

Warning: Maximum number of function evaluations has been exceeded.

Finished calculation

C11 = 4878.003298350236 GPa
C12 = 1305.5126819052548 GPa
  B = 2496.342887386915 GPa