Enter a species (e.g. Al, Fe): Ga Enter a hexagonal lattice type (e.g. hcp): hcp Enter a model name: Sim_LAMMPS_Polymorphic_BereSerra_2006_GaN__SM_518345582208_000 Enter hexagonal lattice constants 'a' and 'c' (m): 2.636839623842394e-10, 4.305941074644132e-10 Calculating isothermal bulk modulus Warning: Maximum number of function evaluations has been exceeded. Finished calculation C11 = 630.2413384395762 GPa C12 = 462.45524950519484 GPa B = 518.3839458166553 GPa