Enter a species  (e.g. Al, Fe): Gd
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): 3.812444350333819e-10, 6.225819716631428e-10

Calculating isothermal bulk modulus

Warning: Maximum number of function evaluations has been exceeded.

Finished calculation

C11 = 1136.7108885868658 GPa
C12 = 304.22089737557747 GPa
  B = 581.7175611126736 GPa