Si diamond Tersoff_LAMMPS_Tersoff_1989_SiGe__MO_350526375143_002 5.432005196809769 Optimization terminated successfully. Current function value: -37.036760 Iterations: 90 Function evaluations: 248 C11 = 142.536734 +/- 0.007336 GPa C12 = 75.376270 +/- 0.005187 GPa C44 = 69.024260 +/- 0.001834 GPa B = 97.763091 +/- 0.004235 GPa