Si diamond Sim_LAMMPS_ModifiedTersoff_PurjaPunMishin_2017_Si__SM_184524061456_000 5.43356011808 Optimization terminated successfully. Current function value: -37.040000 Iterations: 73 Function evaluations: 192 C11 = 172.572578 +/- 0.007336 GPa C12 = 64.571114 +/- 0.005187 GPa C44 = 81.270868 +/- 0.001834 GPa B = 100.571602 +/- 0.004235 GPa