Caesium bromide
Caesium bromide or cesium bromide is an ionic compound of caesium and bromine with the chemical formula CsBr. It is a white or transparent solid with a melting point a 636 °C that readily dissolves in water. Its bulk crystals have the cubic CsCl structure, but the structure changes to the rocksalt type in nanometer-thin film grown on mica, LiF, KBr or NaCl substrates.Synthesis
Caesium bromide can be prepared via following reactions:
- Neutralization:
- Direct synthesis:
The direct synthesis is a vigorous reaction of caesium with other halogens. Due to its high cost, it is not used for preparation.Uses
Caesium bromide is sometimes used in optics as a beamsplitter component in wide-band spectrophotometers.
