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Cesium chloride

CAS number : 7647-17-8

Molecular weight :168.37

Molecular formula/chemical symbol :CsCl

Description :
 

Caesium chloride (cesium chloride in North America), is the inorganic compound with the formula CsCl. This colorless solid is an important source of caesium ions in a variety of applications. Its crystal structure forms a major structural type where each caesium ion is coordinated by 8 chlorine ions. Caesium chloride crystals are thermally stable, but easily dissolve in water and concentrated hydrochloric acid, and therefore gradually disintegrate in the ambient conditions due to moisture. Caesium chloride occurs naturally in mineral waters and as an impurity in carnallite (up to 0.002%), sylvite and kainite. Less than 20 tonnes of CsCl is produced annually worldwide, mostly from a caesium-bearing mineral pollucite

Caesium chloride is colorless in the form of large crystals and white when powdered. It readily dissolves in water with the maximum solubility increasing from 1865 g/L at 20 °C to 2705 g/L at 100 °C. The crystals are very hygroscopic and gradually disintegrate at ambient conditions. Caesium chloride does not form hydrates.

 

Molecular formula

CsCl

Molar mass

168.36 g/mol

Appearance

white solidhygroscopic

Density

3.99 g/cm3

Melting point

645 °C

Boiling point

1297 °C (vaporizes)

Solubility in water

1865 g/L[2]

Solubility

soluble in ethanol[3]

Band gap

8.35 eV (80 K)[1]

Refractive index (nD)

1.64[4]

 

 

KeywordsChloride



USES :

Preparation of metal cesium and cesium-containing single crystal raw material,

Reagents for the analysis.

Report :

Product name

Cesium chloride

CAS7647-17-8

Description

White solidhygroscopic

TEST ITEMS

TEST RESULTS

CsCl

≥99.99

≥99.9

≥99.5

≥99.0

Na

≤0.005

≤0.01

≤0.02

≤0.10

K

≤0.0005

≤0.001

≤0.01

≤0.05

Rb

≤0.001

≤0.002

≤0.01

≤0.2

Ca

≤0.001

≤0.005

≤0.01

≤0.03

Mg

≤0.003

≤0.005

≤0.01

≤0.02

Fe

≤0.0005

≤0.001

≤0.001

≤0.002

Al

≤0.001

≤0.002

≤0.005

≤0.02

Pb

≤0.0001

≤0.0005

≤0.001

≤0.005

Ni

≤0.0001

≤0.001

≤0.001

≤0.05

SO4

---

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≤0.01

≤0.05