Si diamond SW_HauchHollandMarder_1999Brittle_Si__MO_119167353542_004 5.430949777364731 Optimization terminated successfully. Current function value: -34.691200 Iterations: 73 Function evaluations: 193 C11 = 201.416801 +/- 0.007336 GPa C12 = 51.419456 +/- 0.005187 GPa C44 = 90.505844 +/- 0.001834 GPa B = 101.418571 +/- 0.004235 GPa