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Mysterious Whisper (talk | contribs) Undid revision 598482635 by 108.11.131.126 (talk): IUPAC spelling |
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| IUPACName = |
| IUPACName = Caesium bromide |
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| OtherNames = Cesium bromide,<br/> |
| OtherNames = Cesium bromide,<br/>Caesium(I) bromide |
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| Section1 = {{Chembox Identifiers |
| Section1 = {{Chembox Identifiers |
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| CrystalStruct = [[ |
| CrystalStruct = [[Caesium chloride|CsCl]] |
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| Coordination = 8–8 |
| Coordination = 8–8 |
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| OtherAnions = [[ |
| OtherAnions = [[Caesium fluoride]]<br/>[[Caesium chloride]]<br/>[[Caesium iodide]]<br/>[[Caesium astatide]] |
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| OtherCations = [[Sodium bromide]]<br/>[[Potassium bromide]]<br/>[[Rubidium bromide]] |
| OtherCations = [[Sodium bromide]]<br/>[[Potassium bromide]]<br/>[[Rubidium bromide]] |
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'''Cesium bromide''', (CsBr), is an ionic [[chemical compound|compound]] of [[cesium]] and [[bromine]]. It has simple cubic p-type cubic crystallic structure, comparable to that of [[ |
'''Cesium bromide''', (CsBr), is an ionic [[chemical compound|compound]] of [[cesium]] and [[bromine]]. It has simple cubic p-type cubic crystallic structure, comparable to that of [[caesium chloride]] type with [[space group]] ''Pm{{overline|3}}m'' and [[lattice constant]] ''a'' = 0.42953 nm. The distance between Cs<sup>+</sup> and Br<sup>−</sup> ions is 0.37198 nm. |
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== Synthesis == |
== Synthesis == |
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* Direct synthesis: |
* Direct synthesis: |
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: 2 Cs (s) + Br<sub>2</sub> (g) → 2 CsBr (s) |
: 2 Cs (s) + Br<sub>2</sub> (g) → 2 CsBr (s) |
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The direct synthesis is a vigorous reaction of |
The direct synthesis is a vigorous reaction of caesium with other halogens. Due to its high cost, it is not used for preparation. |
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== Uses == |
== Uses == |
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Caesium bromide is sometimes used in optics as a [[beamsplitter]] component in wide-band [[spectrophotometers]]. |
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== See also == |
== See also == |
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* [[ |
* [[Caesium fluoride]] |
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* [[ |
* [[Caesium chloride]] |
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* [[ |
* [[Caesium iodide]] |
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== External links == |
== External links == |
Revision as of 12:24, 7 March 2014
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Names | |
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IUPAC name
Caesium bromide
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Other names
Cesium bromide,
Caesium(I) bromide | |
Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.029.209 |
EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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Properties | |
CsBr | |
Molar mass | 212.81 g/mol |
Appearance | White solid |
Density | 4.44 g/cm3, solid |
Melting point | 636 °C |
Boiling point | 1300 °C |
1062 g/L (15 °C) 1243 g/L (25 °C) | |
Structure | |
CsCl | |
8–8 | |
Hazards | |
Flash point | Non-flammable |
Related compounds | |
Other anions
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Caesium fluoride Caesium chloride Caesium iodide Caesium astatide |
Other cations
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Sodium bromide Potassium bromide Rubidium bromide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Cesium bromide, (CsBr), is an ionic compound of cesium 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.
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 high cost, 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