We hale studied B1-B2 transition and volume collapse in relatively less exp
lored rubidium halides using three body potential model (TBPM) and two body
potential model (TWBPM) and found better results with three body potential
model. Also, rubidium halides obeyed the universal equation of state of Vi
net ct al. [Phys. Rev. B 48 (1993) 5891].