Si fcc SW_BalamaneHauchShi_2017Brittle_Si__MO_381114941873_002 4.32650376111269 Optimization terminated successfully. Current function value: -10.807001 Iterations: 74 Function evaluations: 194 C11 = 850.771640 +/- 0.007336 GPa C12 = 927.786047 +/- 0.005187 GPa C44 = 96.233055 +/- 0.001834 GPa B = 902.114578 +/- 0.004235 GPa