Tungsten arsenide

Crystal structure
	__ W __ As
General
Surname	Tungsten arsenide
other names	Tungsten diarsenide
Ratio formula	WHAT 2
Brief description	black solid
External identifiers / databases
Wikidata	Q55524381
properties
Molar mass	333.68 g mol −1
Physical state	firmly
density	6.9 g cm −3
solubility	practically insoluble in water
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Wolframarsenid is a chemical compound of the tungsten from the group of Arsenide . In addition to this, further tungsten arsenides are known with tungsten triarsenide WAs ₃ and W ₂ As ₃ .

Extraction and presentation

Tungsten arsenide can be obtained by reacting tungsten with arsenic at 600 to 1000 ° C or by reacting arsenic or arsine with tungsten hexachloride .

properties

Tungsten arsenide is a black solid. It has a monoclinic crystal structure of the molybdenum arsenide type MoAs ₂ . Tungsten arsenide is insoluble in hydrofluoric acid , hydrochloric acid and aqueous alkaline solutions. The compound reacts with concentrated nitric acid or sulfuric acid . At high temperatures the compound decomposes in air to form tungsten trioxide and arsenic (III) oxide .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f Erik Lassner, Wolf-Dieter Schubert: Tungsten Properties, Chemistry, Technology of the Element, Alloys, and Chemical Compounds . Springer Science & Business Media, 2012, ISBN 978-1-4615-4907-9 , pp. 145 ( limited preview in Google Book search).
↑ ^a ^b ^c R. J. Meyer: Wolfram . Springer-Verlag, 2013, ISBN 978-3-662-13401-6 , pp. 207 ( limited preview in Google Book search).
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ JB Taylor, LD Calvert, MR Hunt: The Arsenides of Tungsten and Molybdenum: WAs ₂ , W2As ₃ , MoAs ₂ , Mo ₂ As ₃ , and Mo ₅ As ₄ . In: Canadian Journal of Chemistry. No. 43, 1965, p. 3045, doi: 10.1139 / v65-419 .

[Erik_Lassner,_Wolf-Dieter_Schubert-1] ↑ ^a ^b ^c ^d ^e ^f Erik Lassner, Wolf-Dieter Schubert: Tungsten Properties, Chemistry, Technology of the Element, Alloys, and Chemical Compounds . Springer Science & Business Media, 2012, ISBN 978-1-4615-4907-9 , pp. 145 ( limited preview in Google Book search).

[R._J._Meyer-2] R. J. Meyer: Wolfram . Springer-Verlag, 2013, ISBN 978-3-662-13401-6 , pp. 207 ( limited preview in Google Book search).

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[DOI10.1139/v65-419-4] JB Taylor, LD Calvert, MR Hunt: The Arsenides of Tungsten and Molybdenum: WAs ₂ , W2As ₃ , MoAs ₂ , Mo ₂ As ₃ , and Mo ₅ As ₄ . In: Canadian Journal of Chemistry. No. 43, 1965, p. 3045, doi: 10.1139 / v65-419 .