Si bcc SW_ZhangXieHu_2014OptimizedSW1_Si__MO_800412945727_004 3.04376791418 Optimization terminated successfully. Current function value: -6.827169 Iterations: 73 Function evaluations: 191 C11 = 850.330824 +/- 0.007336 GPa C12 = 657.353560 +/- 0.005187 GPa C44 = 78.764544 +/- 0.001834 GPa B = 721.679315 +/- 0.004235 GPa