Si bcc SW_HauchHollandMarder_1999Brittle_Si__MO_119167353542_004 3.390890836715698 Optimization terminated successfully. Current function value: -5.333215 Iterations: 70 Function evaluations: 185 C11 = 744.096843 +/- 0.007336 GPa C12 = 590.091264 +/- 0.005187 GPa C44 = 55.313457 +/- 0.001834 GPa B = 641.426457 +/- 0.004235 GPa