Difference between revisions of "Caesium bromide"

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| OtherNames = Cesium bromide,<br/>Caesium(I) bromide
 
| OtherNames = Cesium bromide,<br/>Caesium(I) bromide
 
| Section1 = {{Chembox Identifiers
 
| Section1 = {{Chembox Identifiers
−
|  CASNo = 7787-69-1
 
−
|    CASNo_Ref = {{cascite}}
 
−
|  EINECS = 232-130-0
 
−
|  PubChem = 24592
 
 
|  InChI = 1/BrH.Cs/h1H;/q;+1/p-1
 
|  InChI = 1/BrH.Cs/h1H;/q;+1/p-1
 
|  InChIKey = LYQFWZFBNBDLEO-REWHXWOFAA
 
|  InChIKey = LYQFWZFBNBDLEO-REWHXWOFAA
 
|  StdInChI = 1S/BrH.Cs/h1H;/q;+1/p-1
 
|  StdInChI = 1S/BrH.Cs/h1H;/q;+1/p-1
 
|  StdInChIKey = LYQFWZFBNBDLEO-UHFFFAOYSA-M
 
|  StdInChIKey = LYQFWZFBNBDLEO-UHFFFAOYSA-M
 +
|  CASNo = 7787-69-1
 +
|    CASNo_Ref = {{cascite}}
 +
|  EC-number = 232-130-0
 +
|  ChemSpiderID = 22994
 +
|  PubChem = 24592
 
   }}
 
   }}
 
| Section2 = {{Chembox Properties
 
| Section2 = {{Chembox Properties
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|  MeltingPt = 636 °C
 
|  MeltingPt = 636 °C
 
|  BoilingPt = 1300 °C
 
|  BoilingPt = 1300 °C
−
|  Solubility = 106.2 g/100 g (15 °C)<br/>124.3 g/100 g (25 °C)
+
|  Solubility = 124.3 g/100 ml (25 °C)
 
   }}
 
   }}
 
| Section3 = {{Chembox Structure
 
| Section3 = {{Chembox Structure
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|  Coordination = Cubic (Cs<sup>+</sup>)<br/>Cubic (Br<sup>−</sup>)
 
|  Coordination = Cubic (Cs<sup>+</sup>)<br/>Cubic (Br<sup>−</sup>)
 
   }}
 
   }}
−
| Section4 = {{Chembox Hazards
+
| Section7 = {{Chembox Hazards
−
|  EUIndex = Not listed
+
|  ExternalMSDS = [http://physchem.ox.ac.uk/MSDS/CA/caesium_bromide.html External MSDS]
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|  RPhrases =
+
|  EUIndex = not listed
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|  SPhrases =  
+
|  FlashPt = non-flammable
−
|  FlashPt = Non-flammable
 
 
   }}
 
   }}
 
| Section8 = {{Chembox Related
 
| Section8 = {{Chembox Related
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|  OtherAnions = [[Caesium fluoride]],<br/>[[Caesium chloride]],<br/>[[Caesium iodide]]
+
|  OtherAnions = [[Caesium fluoride]]<br/>[[Caesium chloride]]<br/>[[Caesium iodide]]
−
|  OtherCations = [[Sodium bromide]],<br/>[[Potassium bromide]]<br/>[[Rubidium bromide]]
+
|  OtherCations = [[Lithium bromide]]<br/>[[Sodium bromide]]<br/>[[Potassium bromide]]<br/>[[Rubidium bromide]]
 
   }}
 
   }}
 
}}
 
}}
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It can be prepared via following reactions:
 
It can be prepared via following reactions:
 
* [[Neutralisation]]:
 
* [[Neutralisation]]:
−
: CsOH (aq) + HBr (aq) → CsBr (aq) + H<sub>2</sub>O (l)
+
:CsOH + HBr → CsBr + H<sub>2</sub>O
−
: Cs<sub>2</sub>(CO<sub>3</sub>) (aq) + 2 HBr (aq) → 2 CsBr (aq) + H<sub>2</sub>O (l) + CO<sub>2</sub> (g)
+
:Cs<sub>2</sub>(CO<sub>3</sub>) + 2HBr → 2CsBr + H<sub>2</sub>O + CO<sub>2</sub>
 
* Direct synthesis:
 
* Direct synthesis:
−
: 2 Cs (s) + Br<sub>2</sub> (g) → 2 CsBr (s)
+
:2Cs + Br<sub>2</sub> → 2CsBr
 
The direct synthesis is vigorous reaction as reaction of caesium with other halogens. Due to its expensiveness, it is not used for preparation.
 
The direct synthesis is vigorous reaction as reaction of caesium with other halogens. Due to its expensiveness, it is not used for preparation.
  
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Caesium bromide is sometimes used in optics as a [[beamsplitter]] component in wide-band [[spectrophotometers]].
 
Caesium bromide is sometimes used in optics as a [[beamsplitter]] component in wide-band [[spectrophotometers]].
  
−
== See also ==
+
== References ==
−
* [[Caesium fluoride]]
+
{{reflist}}
−
* [[Caesium chloride]]
+
{{Unreferenced}}
−
* [[Caesium iodide]]
 
  
 
== External links ==
 
== External links ==
−
* [http://physchem.ox.ac.uk/MSDS/CA/caesium_bromide.html MSDS at Oxford University]
 
 
* [http://www.crystran.co.uk/products.asp?productid=91 Physical data], [http://wonwoosystem.co.kr/product/crystran/pdf/Caesium_Bromide(CsBr).pdf PDF version]
 
* [http://www.crystran.co.uk/products.asp?productid=91 Physical data], [http://wonwoosystem.co.kr/product/crystran/pdf/Caesium_Bromide(CsBr).pdf PDF version]
 
* [http://www.webelements.com/webelements/compounds/text/Cs/Br1Cs1-7787691.html Caesium bromide at webelements.com]
 
* [http://www.webelements.com/webelements/compounds/text/Cs/Br1Cs1-7787691.html Caesium bromide at webelements.com]
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* [http://doc.cern.ch/tmp/convert_SCAN-9806049.pdf Ultra-violet photoabsorption measurements in alkali iodide and caesium bromide evaporated films]
 
* [http://doc.cern.ch/tmp/convert_SCAN-9806049.pdf Ultra-violet photoabsorption measurements in alkali iodide and caesium bromide evaporated films]
  
 +
[[Category:Caesium compounds]]
 
[[Category:Bromides]]
 
[[Category:Bromides]]
−
[[Category:Caesium compounds]]
 
  
 
{{Imported from Wikipedia|name=Caesium bromide|id=279984605}}
 
{{Imported from Wikipedia|name=Caesium bromide|id=279984605}}

Revision as of 16:47, 23 August 2009

Caesium bromide
Caesium-bromide-3D-ionic.png
IUPAC name Caesium bromide
Other names Cesium bromide,
Caesium(I) bromide
Identifiers
InChI InChI=1/BrH.Cs/h1H;/q;+1/p-1
InChIKey LYQFWZFBNBDLEO-REWHXWOFAA
Standard InChI InChI=1S/BrH.Cs/h1H;/q;+1/p-1
Standard InChIKey LYQFWZFBNBDLEO-UHFFFAOYSA-M
CAS number [7787-69-1]
EC number 232-130-0
ChemSpider 22994
PubChem 24592
Properties
Chemical formula CsBr
Molar mass 212.81 g/mol
Appearance White solid
Density 4.44 g/cm3, solid
Melting point

636 °C

Boiling point

1300 °C

Solubility in water 124.3 g/100 ml (25 °C)
Structure
Crystal structure CsCl
Space group Pm3m, No. 221
Lattice constant a = 429.53 pm
Coordination geometry Cubic (Cs+)
Cubic (Br−)
Hazards
Material safety data sheet (MSDS) External MSDS
EU index number not listed
Flash point non-flammable
Related compounds
Other anions Caesium fluoride
Caesium chloride
Caesium iodide
Other cations Lithium bromide
Sodium bromide
Potassium bromide
Rubidium bromide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Caesium bromide, (CsBr), is an ionic compound of caesium and bromine. It has the caesium chloride structure, with a caesium–bromine distance of 303.72 nm.

Synthesis

It can be prepared via following reactions:

CsOH + HBr → CsBr + H2O
Cs2(CO3) + 2HBr → 2CsBr + H2O + CO2
  • Direct synthesis:
2Cs + Br2 → 2CsBr

The direct synthesis is vigorous reaction as 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.

References

External links

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