Si sc SW_ZhangXieHu_2014OptimizedSW2_Si__MO_475612090600_004 2.54328680038 Warning: Maximum number of function evaluations has been exceeded. C11 = 421.538039 +/- 0.007336 GPa C12 = 66.573810 +/- 0.005187 GPa C44 = 39.525854 +/- 0.001834 GPa B = 184.895219 +/- 0.004235 GPa