Si bcc SW_HauchHollandMarder_1999Brittle_Si__MO_119167353542_005 3.3908908516168603 Optimization terminated successfully. Current function value: -5.333215 Iterations: 73 Function evaluations: 186 C11 = 744.096861 +/- 0.007336 GPa C12 = 590.091267 +/- 0.005187 GPa C44 = 55.313456 +/- 0.001834 GPa B = 641.426465 +/- 0.004235 GPa