Rubidium bromide

Rubidium bromide is an <a href="/facts/Inorganic_compound/TfFfzxSz">inorganic compound</a> with the <a href="/facts/Chemical_formula/hghUtthl">chemical formula</a> <a href="/facts/Rubidium/KDHSe2HM">Rb</a><a href="/facts/Bromine/oLfj3C7D">Br</a>. It is a <a href="/facts/Salt_(chemistry)/lsSKwGpn">salt</a> of <a href="/facts/Hydrogen_bromide/rUw1duLA">hydrogen bromide</a>. It consists of <a href="/facts/Bromide/bHSfxGk1">bromide</a> <a href="/facts/Anions/wrbwhF3z">anions</a> Br− and <a href="/facts/Rubidium/KDHSe2HM">rubidium</a> <a href="/facts/Cations/wrbwhF3z">cations</a> Rb+. It has a <a href="/facts/Sodium_chloride/MWcXl3Mb">NaCl</a> crystal structure, with a lattice constant of 685 picometres.
There are several methods for synthesising rubidium bromide. One involves reacting <a href="/facts/Rubidium_hydroxide/T9fnSIKz">rubidium hydroxide</a> with <a href="/facts/Hydrobromic_acid/T6INXDR6">hydrobromic acid</a>:

RbOH + HBr → RbBr + H2O
Another method is to neutralize <a href="/facts/Rubidium_carbonate/gtDdUaVb">rubidium carbonate</a> with hydrobromic acid:

Rb2CO3 + 2 HBr → 2 RbBr + H2O + CO2
Rubidium metal would react directly with bromine to form RbBr, but this is not a sensible production method, since rubidium metal is substantially more expensive than the carbonate or hydroxide; moreover, the reaction would be explosive.

<ul><li><a href="http://www.webelements.com/webelements/compounds/text/Rb/Br1Rb1-7789391.html">WebElements</a>. URL accessed March 1, 2006.</li></ul>

Rubidium bromide open-in-new

Rubidium bromide