Na diamond MEAM_LAMMPS_KimKoLee_2020_NaSn__MO_329881861557_001 7.972748875617981 Optimization terminated successfully. Current function value: -5.656887 Iterations: 70 Function evaluations: 184 C11 = 2.596763 +/- 0.007336 GPa C12 = 2.473099 +/- 0.005187 GPa C44 = 0.104433 +/- 0.001834 GPa B = 2.514320 +/- 0.004235 GPa