Si diamond SW_ZhangXieHu_2014OptimizedSW1_Si__MO_800412945727_004 5.177553489804269 Optimization terminated successfully. Current function value: -27.435814 Iterations: 82 Function evaluations: 222 C11 = 141.340254 +/- 0.007336 GPa C12 = 80.710451 +/- 0.005187 GPa C44 = 47.852679 +/- 0.001834 GPa B = 100.920385 +/- 0.004235 GPa