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;
UNII	06M25EDM3F;
	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	212.809 g/mol[1]
Appearance	White solid
Density	4.43 g/cm3[1]
Melting point	636 °C (1,177 °F; 909 K)[1]
Boiling point	1,300 °C (2,370 °F; 1,570 K)[1]
Solubility in water	1230 g/L (25 °C)[1]
Magnetic susceptibility (χ)	-67.2·10−6 cm3/mol[2]
Refractive index (nD)	1.8047 (0.3 µm); 1.6974 (0.59 µm); 1.6861 (0.75 µm); 1.6784 (1 µm); 1.6678 (5 µm); 1.6439 (20 µm)[3]
Structure
Crystal structure	CsCl, cP2
Space group	Pm3m, No. 221[4]
Lattice constant	a = 0.4291 nm
Lattice volume (V)	0.0790 nm3
Formula units (Z)	1
Coordination geometry	Cubic (Cs+); Cubic (Br−)
Hazards
GHS pictograms
GHS signal word	Warning
GHS hazard statements	H302, H315, H319, H335
GHS precautionary statements	P261, P264, P270, P271, P280, P301+312, P302+352, P304+340, P305+351+338, P312, P321, P330, P332+313, P337+313, P362, P403+233, P405, P501
NFPA 704	0 2 0
Flash point	Non-flammable
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	1400 mg/kg (oral, rat)[5]
Related compounds
Other anions	Caesium fluoride; Caesium chloride; Caesium iodide; Caesium astatide
Other cations	Sodium bromide; Potassium bromide; Rubidium bromide; Francium 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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	Infobox references

Caesium bromide or cesium bromide is an ionic compound of caesium and bromine with the chemical formula CsBr. It is a white or transparent solid with a melting point a 636 °C that readily dissolves in water. Its bulk crystals have the cubic CsCl structure, but the structure changes to the rocksalt type in nanometer-thin film grown on mica, LiF, KBr or NaCl substrates.^[6]

Synthesis

Caesium bromide 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.

References

1 2 3 4 5 Haynes, p. 4.57
↑ Haynes, p. 4.132
↑ Haynes, p. 10.240
↑ Vallin, J.; Beckman, O.; Salama, K. (1964). "Elastic Constants of CsBr and CsI from 4.2°K to Room Temperature". Journal of Applied Physics. 35 (4): 1222. doi:10.1063/1.1713597.
↑ Caesium bromide. nlm.nih.gov
↑ Schulz, L. G. (1951). "Polymorphism of cesium and thallium halides". Acta Crystallographica. 4 (6): 487. doi:10.1107/S0365110X51001641.

Cited sources

Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. ISBN 1439855110.

External links

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[r1-1] 1 2 3 4 5 Haynes, p. 4.57

[2] Haynes, p. 4.132

[3] Haynes, p. 10.240

[str2-4] Vallin, J.; Beckman, O.; Salama, K. (1964). "Elastic Constants of CsBr and CsI from 4.2°K to Room Temperature". Journal of Applied Physics. 35 (4): 1222. doi:10.1063/1.1713597.

[5] Caesium bromide. nlm.nih.gov

[str-6] Schulz, L. G. (1951). "Polymorphism of cesium and thallium halides". Acta Crystallographica. 4 (6): 487. doi:10.1107/S0365110X51001641.

Names

IUPAC name Caesium bromide
Other names Cesium bromide, Caesium(I) bromide
Identifiers
CAS Number	7787-69-1^Y
3D model (JSmol)	Interactive image
ChemSpider	22994^Y
ECHA InfoCard	100.029.209
EC Number	232-130-0
PubChem CID	24592
UNII	06M25EDM3F
InChI InChI=1S/BrH.Cs/h1H;/q;+1/p-1^Y Key: LYQFWZFBNBDLEO-UHFFFAOYSA-M^Y InChI=1/BrH.Cs/h1H;/q;+1/p-1 Key: LYQFWZFBNBDLEO-REWHXWOFAA
SMILES [Cs+].[Br-]
Properties
Chemical formula	CsBr
Molar mass	212.809 g/mol^[1]
Appearance	White solid
Density	4.43 g/cm³^[1]
Melting point	636 °C (1,177 °F; 909 K)^[1]
Boiling point	1,300 °C (2,370 °F; 1,570 K)^[1]
Solubility in water	1230 g/L (25 °C)^[1]
Magnetic susceptibility (χ)	-67.2·10⁻⁶ cm³/mol^[2]
Refractive index (n_D)	1.8047 (0.3 µm) 1.6974 (0.59 µm) 1.6861 (0.75 µm) 1.6784 (1 µm) 1.6678 (5 µm) 1.6439 (20 µm)^[3]
Structure
Crystal structure	CsCl, cP2
Space group	Pm3m, No. 221^[4]
Lattice constant	a = 0.4291 nm
Lattice volume (V)	0.0790 nm³
Formula units (Z)	1
Coordination geometry	Cubic (Cs⁺) Cubic (Br⁻)
Hazards
GHS pictograms
GHS signal word	Warning
GHS hazard statements	H302, H315, H319, H335
GHS precautionary statements	P261, P264, P270, P271, P280, P301+312, P302+352, P304+340, P305+351+338, P312, P321, P330, P332+313, P337+313, P362, P403+233, P405, P501
NFPA 704	0 2 0
Flash point	Non-flammable
Lethal dose or concentration (LD, LC):
LD₅₀ (median dose)	1400 mg/kg (oral, rat)^[5]
Related compounds
Other anions	Caesium fluoride Caesium chloride Caesium iodide Caesium astatide
Other cations	Sodium bromide Potassium bromide Rubidium bromide Francium bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is ^YN ?)
Infobox references