Enter a species (e.g. Al, Fe): Pu 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): 3.637384919040995e-10, 5.939943109889017e-10 Calculating isothermal bulk modulus Warning: Maximum number of function evaluations has been exceeded. Finished calculation C11 = 292.37907076650345 GPa C12 = 78.25017286224369 GPa B = 149.6264721636636 GPa