Si bcc SW_ZhangXieHu_2014OptimizedSW1_Si__MO_800412945727_004 3.0437679141759872 Optimization terminated successfully. Current function value: -6.827169 Iterations: 70 Function evaluations: 187 C11 = 850.330795 +/- 0.007336 GPa C12 = 657.353546 +/- 0.005187 GPa C44 = 78.764544 +/- 0.001834 GPa B = 721.679295 +/- 0.004235 GPa