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 7VD8
Zn in 7V1R
Zn in 7V1Q
Zn in 7VPF
Zn in 7T85
Zn in 7T5F
Zn in 7NF9
Zn in 7M4M
Zn in 7M4O
Zn in 7M4N
© Copyright 2008-2020 by
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy