Si fcc SW_HauchHollandMarder_1999Brittle_Si__MO_119167353542_004 4.32650376111269 Optimization terminated successfully. Current function value: -10.121702 Iterations: 74 Function evaluations: 186 C11 = 796.822096 +/- 0.007336 GPa C12 = 868.952828 +/- 0.005187 GPa C44 = 90.130678 +/- 0.001834 GPa B = 844.909251 +/- 0.004235 GPa