Si bcc SW_BalamaneHauchShi_2017Brittle_Si__MO_381114941873_002 3.39089084417 Warning: Maximum number of function evaluations has been exceeded. C11 = 794.476525 +/- 0.007336 GPa C12 = 630.043893 +/- 0.005187 GPa C44 = 59.058502 +/- 0.001834 GPa B = 684.854770 +/- 0.004235 GPa