He fcc LJ_ElliottAkerson_2015_Universal__MO_959249795837_003 0.770146146417 Optimization terminated successfully. Current function value: -0.031372 Iterations: 72 Function evaluations: 185 C11 = 125.657528 +/- 0.007336 GPa C12 = 71.693150 +/- 0.005187 GPa C44 = 71.842160 +/- 0.001834 GPa B = 89.681276 +/- 0.004235 GPa