Si diamond Tersoff_LAMMPS_Tersoff_1988T2_Si__MO_245095684871_003 5.431230753660202 Optimization terminated successfully. Current function value: -37.043297 Iterations: 70 Function evaluations: 187 C11 = 121.704585 +/- 0.007336 GPa C12 = 85.808775 +/- 0.005187 GPa C44 = 10.310359 +/- 0.001834 GPa B = 97.774045 +/- 0.004235 GPa