Suvarna Garge (Editor)

Caesium bromide

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Formula
  
CsBr

Density
  
4.44 g/cm³

Boiling point
  
1,300 °C

Molar mass
  
212.81 g/mol

Melting point
  
636 °C

Appearance
  
White solid

Caesium bromide FileCaesiumbromideunitcell3Dballspng Wikimedia Commons

Caesium bromide, (CsBr), is an ionic compound of caesium and bromine. It has simple cubic p-type cubic crystallic structure, comparable to that of caesium chloride type with space group Pm3m and lattice constant a = 0.42953 nm. The distance between Cs+ and Br− ions is 0.37198 nm.

Contents

Caesium bromide FileCaesiumbromideunitcell3Dionicpng Wikimedia Commons

Synthesis

It can be prepared via following reactions:

  • Neutralization:

    • Caesium bromide Caesium bromide
    CsOH (aq) + HBr (aq) → CsBr (aq) + H2O (l)Cs2(CO3) (aq) + 2 HBr (aq) → 2 CsBr (aq) + H2O (l) + CO2 (g)
  • Direct synthesis:
    • 2 Cs (s) + Br2 (g) → 2 CsBr (s)
    Caesium bromide Caesium Bromide Optical Material

    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.

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    Caesium bromide Caesiumcaesium bromide WebElements Periodic Table

    References

    Caesium bromide Wikipedia
    (Text) CC BY-SA


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