Si diamond SW_ZhangXieHu_2014OptimizedSW1_Si__MO_800412945727_004 5.1775534898 Warning: Maximum number of function evaluations has been exceeded. C11 = 141.340253 +/- 0.007336 GPa C12 = 80.710451 +/- 0.005187 GPa C44 = 47.852680 +/- 0.001834 GPa B = 100.920385 +/- 0.004235 GPa