Rubidium bromide is an inorganic compound with the chemical formula . It is a salt of hydrogen bromide. It consists of bromide anions and rubidium cations . It has a NaCl crystal structure, with a lattice constant of 685 picometres.
Preparation There are several methods for synthesising rubidium bromide. One involves reacting rubidium hydroxide with hydrobromic acid:
RbOH + HBr → RbBr + H2O
Another method is to neutralize rubidium carbonate with hydrobromic acid:
Rb2CO3 + 2 HBr → 2 RbBr + H2O + CO2
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