Atomistry » Chromium » Compounds » Cobalt Chromate
Atomistry »
  Chromium »
    Compounds »
      Cobalt Chromate »

Cobalt Chromate, CoCrO4

Cobalt Chromate, CoCrO4, results as a greyish-black crystalline powder when a mixture containing cobalt carbonate (12.4 grams), chromium trioxide (20 grams), and water (20 grams) is heated for four hours in a sealed tube at 185° C. It is much more soluble than the corresponding nickel salt. The dihydrate CoCrO4.2H2O yields bronze-coloured acicular prisms.

Basic salts are produced when cobalt salts are precipitated with sodium chromate, or when the alkali-containing double salts first produced by precipitation with ammonium or potassium chromates are subjected to continued treatment with hot water. The following double salts have been described:

(NH4)2Co(CrO4)2.6H2O; (NH4)2CrO4.3CoCrO4.2NH3.3H2O; K2O.4CoO.4CrO3.3H2O and K2Co(CrO4)2.2H2O; Cs2Co(CrO4)2.6H2O.

Last articles

Zn in 7OQY
Zn in 7PEL
Zn in 7OYG
Zn in 7P3S
Zn in 7PE7
Zn in 7RZC
Zn in 7PE9
Zn in 7PE8
Zn in 7RAG
Zn in 7RN5
© Copyright 2008-2020 by
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy