Rn fcc LJ_ElliottAkerson_2015_Universal__MO_959249795837_003 4.12579125166 Optimization terminated successfully. Current function value: -0.715915 Iterations: 73 Function evaluations: 193 C11 = 18.651402 +/- 0.007336 GPa C12 = 10.641446 +/- 0.005187 GPa C44 = 10.663564 +/- 0.001834 GPa B = 13.311431 +/- 0.004235 GPa