Atomistry » Vanadium » Chemical Properties » Molybdo-vanadosilicates
Atomistry »
  Vanadium »
    Chemical Properties »
      Molybdo-vanadosilicates »

Molybdo-vanadosilicates

The simple vanado-silicates do not appear to be stable, but a number of molybdo-vanadosilicates have been obtained either by acidifying solutions which contain molybdates, vanadates and silicates, or by addition of vanadium pentoxide to the molybdo-silicates. They form heavy, yellowish-red to brownish-red crystals, which are very easily hydrolysed and are, therefore, not always reproducible. The following isomorphous series has been recognised:

3R2O.SiO2.V2O5.9MoO3.xH2O or ; 3R2O.SiO2.V2O5.10MoO3.xH2O or ; 3R2O.SiO2.V2O5.11MoO3.xH2O; 3R2O.SiO2.V2O5.15MoO3.xH2O.

(R = NH4 or K; R2 = Ba.)

Potassium-ammonium double salts have also been prepared. The first two series can be looked upon as derivatives of the co-ordinated silico-acid, H8[SiIVO6]; the last two series cannot be formulated in accordance with Werner's theory.

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