Si diamond Tersoff_LAMMPS_Tersoff_1988T3_Si__MO_186459956893_003 5.431978940963745 Optimization terminated successfully. Current function value: -37.037804 Iterations: 1064 Function evaluations: 3169 C11 = 142.529863 +/- 0.007336 GPa C12 = 75.384551 +/- 0.005187 GPa C44 = 69.012745 +/- 0.001834 GPa B = 97.766322 +/- 0.004235 GPa