Na bcc MEAM_LAMMPS_KimKoLee_2020_NaSn__MO_329881861557_001 4.195095829665661 Optimization terminated successfully. Current function value: -2.225934 Iterations: 85 Function evaluations: 231 C11 = 10.898405 +/- 0.007336 GPa C12 = 6.791979 +/- 0.005187 GPa C44 = 6.524711 +/- 0.001834 GPa B = 8.160788 +/- 0.004235 GPa