Si diamond ThreeBodyCluster_BH_BiswasHamann_1987_Si__MO_019616213550_000 5.431844830513001 Optimization terminated successfully. Current function value: -36.835565 Iterations: 90 Function evaluations: 246 C11 = 204.363322 +/- 0.007336 GPa C12 = 151.737136 +/- 0.005187 GPa C44 = 45.008957 +/- 0.001834 GPa B = 169.279198 +/- 0.004235 GPa