Caesium bromide

Caesium bromide
Names
	IUPAC name Caesium bromide
	Other names Cesium bromide,; Caesium(I) bromide
Identifiers
CAS Number	7787-69-1 ;
3D model (JSmol)	Interactive image;
ChemSpider	22994 ;
ECHA InfoCard	100.029.209
EC Number	232-130-0;
PubChem CID	24592;
CompTox Dashboard (EPA)	DTXSID8064854 ;
	InChI InChI=1S/BrH.Cs/h1H;/q;+1/p-1 Key: LYQFWZFBNBDLEO-UHFFFAOYSA-M ; InChI=1/BrH.Cs/h1H;/q;+1/p-1 Key: LYQFWZFBNBDLEO-REWHXWOFAA;
	SMILES [Cs+].[Br-];
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	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; Caesium astatide
Other cations	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). verify (what is ?) Infobox references

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. The distance between Cs⁺ and Br⁻ ions is 0.37198 nm.

Synthesis

It can be prepared via following reactions:

Neutralization:

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.

External links

Synthesis

Uses

See also

External links