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Caesium azide

Chemical compound From Wikipedia, the free encyclopedia

Caesium azide
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Caesium azide or cesium azide is an inorganic compound of caesium and nitrogen. It is a salt of azide with the formula CsN3.

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Structure

CsN3 adopts the same structure as KN3, RbN3, and TlN3, crystallizing in a tetragonal distorted caesium chloride structure where each azide ion coordinates to eight metal cations, and each metal cation coordinates to eight terminal N centers.[2] When heated to 151 °C, it transitions to a cubic structure.[3]

Preparation and reactions

Caesium azide can be prepared from the neutralization reaction between hydrazoic acid and caesium hydroxide:[4]

CsOH + HN3 → CsN3 + H2O

Caesium carbonate can also be used as the base:

Cs2CO3 + HN3 → CsN3 + CO2 + H2O

Caesium sulfate reacts with barium azide to form insoluble barium sulfate and caesium azide:

Cs2SO4 + Ba(N3)2 → 2CsN3 + BaSO4

The thermal decomposition of CsN3 in vacuo can be used as a method of generating high purity caesium metal:[5]

2 CsN3 → 2 Cs + 3 N2

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References

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