Si fcc Tersoff_LAMMPS_Tersoff_1989_SiGe__MO_350526375143_002 3.897482573986054 Optimization terminated successfully. Current function value: -15.470863 Iterations: 1064 Function evaluations: 3089 C11 = 1226.657761 +/- 0.007336 GPa C12 = 1188.558795 +/- 0.005187 GPa C44 = 204.010910 +/- 0.001834 GPa B = 1201.258450 +/- 0.004235 GPa