Cesium tungstate

Structural formula
__ Cs + __ W 6+ __ O 2−
Crystal system	orthorhombic
Space group	Pmcn (No. 62, position 5)
Lattice parameters	a = 6.598 (2) Å b = 11.647 (3) Å c = 8.513 (2) Å
General
Surname	Cesium tungstate
other names	Cesium tungsten oxide
Molecular formula	Cs 2 WO 4
Brief description	white odorless solid
External identifiers / databases
CAS number 13587-19-4 EC number 237-019-0 ECHA InfoCard 100.033.639 PubChem 22269592 Wikidata Q4124798
properties
Molar mass	513.66 g mol −1
Physical state	firmly
solubility	soluble in water
safety instructions
GHS labeling of hazardous substances no GHS pictograms H and P phrases H: no H-phrases P: no P-phrases
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Cesium tungstate is an inorganic chemical compound of cesium from the group of tungstates .

Extraction and presentation

Examples of possible reactions are:

• made of tungsten (VI) oxide and cesium hydroxide (analogous to the representation of sodium tungstate ):

${\displaystyle {\ce {WO3 + 2CsOH -> Cs2WO4 + H2O}}}$

• from cesium chloride and silver tungstate :

${\displaystyle {\ce {Ag2WO4 + 2CsCl -> Cs2WO4 + 2AgCl v}}}$

properties

Cesium tungstate is a white, odorless solid that is soluble in water. At room temperature the compound is present in an orthorhombic crystal system in the space group Pmcn (space group no. 62, position 5) isotypic to cesium molybdate and β- potassium sulfate . At 536 ° C there is a phase change from an orthorhombic to a hexagonal crystal structure .

use

Cesium tungstate is used to produce transparent insulation coatings with good properties for infrared radiation .

Individual evidence

1. ↑ ^{a b} F. Kools X nm, AS Koster, GD Rieck: The Structures of potassium, rubidium and cesium molybdates and tungstates . In: Acta Cryst. B26, 1970, p. 19741-1977 , doi : 10.1107 / S0567740870005277 .
2. ↑ ^{a b c d e f g} data sheet cesium tungstate from AlfaAesar, accessed on June 12, 2016 ( PDF )(JavaScript required) .
3. ↑ ^{a b} Jane E. Macintyre: Dictionary of Inorganic Compounds . CRC Press, 1992, ISBN 978-0-412-30120-9 , pp. 3097 ( limited preview in Google Book Search).