Atomistry » Chromium » Compounds » Chromic Sulphide
Atomistry »
  Chromium »
    Compounds »
      Chromic Sulphide »

Chromic Sulphide, Cr2S3

Chromic Sulphide, Cr2S3, is formed when dry hydrogen sulphide is passed over chromium sesquioxide at 440° C.. or over heated chromium sesquichloride, excess of sulphur being removed with carbon disulphide. It may also be obtained by the action of carbon disulphide upon heated chromic oxide, Cr2O3, or potassium dichromate. Another method consists in heating the sesquioxide, or metallic chromium, in carbon disulphide vapour.

Chromic sulphide is a brownish-black, lustrous amorphous powder, of density 3.538 at 14° C. When heated in air it gives sulphur dioxide and chromium sesquioxide, while in hydrogen it yields chromous sulphide. It is attacked and oxidised by nitric acid, aqua regia, and fused potassium nitrate. Compounds of chromic sulphide with sulphides of other metals have been described. Regarding chromic sulphide as the thioanhydride of thiochromous acid, H2Cr2S4, these compounds may be described as thiochromites.

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 atomistry.com
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy