Vanadium(III) oxide
From Wikipedia, the free encyclopedia
| Vanadium(III) oxide | |
|---|---|
| Other names | Vanadium sesquioxide, Vanadic oxide |
| Properties | |
| Molecular formula | V2O3 |
| Molar mass | 149.88 g/mol |
| Appearance | Black powder |
| Density | 4.87 g/cm³ |
| Melting point |
1940°C |
| Solubility in other solvents | Insoluble |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
|
Vanadium trioxide is the chemical compound V2O3. It is prepared by reduction of V2O5 with hydrogen or carbon monoxide.[1]It is a basic oxide dissolving in acids to give reducing vanadium(III) solutions.[1] V2O3 has the corundum structure.[1] It is antiferromagnetic with a critical temperature of 160 K. [2] At this temperature there is an abrupt change in conductivity from metallic to insulating.[2]
On exposure to air it is gradually converted into indigo-blue crystals of V2O4.[2] Vanadium trioxide is generally used as a catalyst when making ethanol from ethylene.[citation needed]
[edit] References
- ^ a b c Greenwood, N. N.; Earnshaw, A. (1997). Chemistry of the Elements, 2nd Edition, Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.
- ^ a b c E.M. Page, S.A.Wass (1994),Vanadium:Inorganic and Coordination chemistry, Encyclopedia of Inorganic Chemistry, John Wiley & Sons, ISBN 0471936200
 |
This inorganic compound-related article is a stub. You can help Wikipedia by expanding it. |
