Enter a species (e.g. Al, Fe): Cf 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): 3.267812568342914e-10, 5.336422092133711e-10 Calculating isothermal bulk modulus Warning: Maximum number of function evaluations has been exceeded. Finished calculation C11 = 533.9333552103171 GPa C12 = 142.89796375880167 GPa B = 273.24309424264015 GPa