Difference between revisions of "Caesium bromide"
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| Section3 = {{Chembox Structure | | Section3 = {{Chembox Structure | ||
| CrystalStruct = [[Caesium chloride|CsCl]] | | CrystalStruct = [[Caesium chloride|CsCl]] | ||
| − | | Coordination = | + | | SpaceGroup = Pm3m, No. 221 |
| + | | LattConst_a = 429.53 pm | ||
| + | | Coordination = Cubic (Cs<sup>+</sup>)<br/>Cubic (Br<sup>−</sup>) | ||
}} | }} | ||
| Section4 = {{Chembox Hazards | | Section4 = {{Chembox Hazards | ||
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}} | }} | ||
| − | '''Caesium bromide''', (CsBr), is an ionic [[chemical compound|compound]] of [[caesium]] and [[bromine]]. It has | + | '''Caesium bromide''', (CsBr), is an ionic [[chemical compound|compound]] of [[caesium]] and [[bromine]]. It has the [[caesium chloride]] structure, with a caesium–bromine distance of 303.72 nm. |
== Synthesis == | == Synthesis == | ||
Revision as of 11:52, 15 August 2009
| Caesium bromide | |
|---|---|
| |
| 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 | [] |
| EC number | |
| PubChem | |
| 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 | 106.2 g/100 g (15 °C) 124.3 g/100 g (25 °C) |
| Structure | |
| Crystal structure | CsCl |
| Space group | Pm3m, No. 221 |
| Lattice constant | a = 429.53 pm |
| Coordination geometry | Cubic (Cs+) Cubic (Br−) |
| Hazards | |
| EU index number | Not listed |
| Flash point | Non-flammable |
| Related compounds | |
| Other anions | Caesium fluoride, Caesium chloride, Caesium iodide |
| Other cations | 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.
Contents
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 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.
See also
External links
- MSDS at Oxford University
- Physical data, 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
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This page was originally imported from Wikipedia, specifically this version of the article "Caesium bromide". Please see the history page on Wikipedia for the original authors. This WikiChem article may have been modified since it was imported. It is licensed under the Creative Commons Attribution–Share Alike 3.0 Unported license. |
