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| Names | |
|---|---|
| IUPAC name Caesium bromide | |
| Other names
Cesium bromide, Caesium(I) bromide | |
| Identifiers | |
| CAS Number | |
| 3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.029.209 
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| EC Number |
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| PubChem CID | |
| CompTox Dashboard (EPA) | |
InChI
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SMILES
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| Properties | |
| Chemical formula | CsBr |
| Molar mass | 212.81 g/mol |
| Appearance | White solid |
| Density | 4.44 g/cm, solid |
| Melting point | 636 °C |
| Boiling point | 1300 °C |
| Solubility in water | 1062 g/L (15 °C) 1243 g/L (25 °C) |
| Structure | |
| Crystal structure | CsCl |
| Coordination geometry | 8–8 |
| Hazards | |
| Flash point | Non-flammable |
| Related compounds | |
| Other anions | Caesium fluoride, Caesium chloride, Caesium iodide |
| Other cations | Sodium bromide, Potassium bromide Rubidium bromide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
 Y verify (what is ?)
Infobox references
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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. Distance between Cs and Br atoms is 0.37198 nm.
Synthesis
It can be prepared via following reactions:
- 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)
The direct synthesis is a vigorous reaction of caesium with other halogens. Due to its expensiveness, it is not used for preparation.
Uses
Caesium bromide is sometimes used in optics as a beamsplitter component in wide-band spectrophotometers.
See also
External links
- MSDS at Oxford University
- Physical data, Crystran PDF version, PDF version
- Caesium bromide at webelements.com
- Relaxed Excited States Origin and Structure in Lead-Doped Caesium Bromide
- IR transmission spectrum
- Ultra-violet photoabsorption measurements in alkali iodide and caesium bromide evaporated films
| Caesium compounds | |
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