Rb bcc Sim_LAMMPS_EIM_Zhou_2010_BrClCsFIKLiNaRb__SM_259779394709_001 5.487757369875908 C11 = 15.007080 +/- 0.007336 GPa C12 = 10.697029 +/- 0.005187 GPa C44 = 10.697147 +/- 0.001834 GPa B = 12.133712 +/- 0.004235 GPa