Si bcc SW_ZhangXieHu_2014OptimizedSW2_Si__MO_475612090600_005 3.14516343921423 Optimization terminated successfully. Current function value: -5.804022 Iterations: 74 Function evaluations: 193 C11 = 839.454199 +/- 0.007336 GPa C12 = 621.002478 +/- 0.005187 GPa C44 = 59.335644 +/- 0.001834 GPa B = 693.819718 +/- 0.004235 GPa