Atomistry » Tungsten » Compounds » Tungsten Diarsenide
Atomistry »
  Tungsten »
    Compounds »
      Tungsten Diarsenide »

Tungsten Diarsenide, WAs2

Tungsten Diarsenide, WAs2, is prepared by heating pure tungsten hexachloride in a current of hydrogen arsenide, the temperature being maintained at 150° to 200° C. for a time and then gradually raised to 350° C. The arsenide remains as a black crystalline mass, of density 6.9 at 18° C. It is stable in air at ordinary temperature; at red heat it is readily oxidised, leaving a residue of yellow tungstic anhydride. It readily combines with chlorine, sulphur, and phosphorus when heated. It is quite insoluble in water, carbon disulphide, and the usual organic solvents; solutions of hydrofluoric and hydrochloric acids have no action upon it, but nitric acid and aqua regia oxidise it on warming. Fused alkalies and alkali carbonates act upon it to form arsenate and tungstate.

Last articles

Zn in 7NA9
Zn in 7LZP
Zn in 7M1H
Zn in 7L6V
Zn in 7CM0
V in 7P8R
Ni in 7L19
Na in 7T88
Na in 7MJ5
Na in 7L00
© Copyright 2008-2020 by atomistry.com
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy