Enter a species  (e.g. Al, Fe): Cu
Enter a hexagonal lattice type (e.g. hcp): hcp
Enter a model name: EAM_NN_Johnson_1988_Cu__MO_887933271505_002
Enter hexagonal lattice constants 'a' and 'c' (m): 2.474873722897834e-10, 4.041451921086292e-10

Calculating isothermal bulk modulus

Warning: Maximum number of function evaluations has been exceeded.

Finished calculation

C11 = 587706.8702074006 GPa
C12 = 412.4118549947969 GPa
  B = 196177.2313057967 GPa