Si bcc SW_LeeHwang_2012GGA_Si__MO_040570764911_000 3.33437070996 Warning: Maximum number of function evaluations has been exceeded. C11 = 557.232096 +/- 0.007336 GPa C12 = 412.926796 +/- 0.005187 GPa C44 = 38.703799 +/- 0.001834 GPa B = 461.028563 +/- 0.004235 GPa