Si diamond SW_ZhangXieHu_2014OptimizedSW2_Si__MO_475612090600_004 5.17797607929 Warning: Maximum number of function evaluations has been exceeded. C11 = 158.046700 +/- 0.007336 GPa C12 = 66.249652 +/- 0.005187 GPa C44 = 64.588448 +/- 0.001834 GPa B = 96.848668 +/- 0.004235 GPa