Si fcc SW_ZhangXieHu_2014OptimizedSW2_Si__MO_475612090600_004 4.01992595196 Optimization terminated successfully. Current function value: -11.168512 Iterations: 71 Function evaluations: 184 C11 = 696.716871 +/- 0.007336 GPa C12 = 748.915635 +/- 0.005187 GPa C44 = 82.445876 +/- 0.001834 GPa B = 731.516047 +/- 0.004235 GPa