Vanadium_trioxide

Vanadium(III) oxide

Vanadium(III) oxide

Chemical compound

Vanadium(III) oxide is the inorganic compound with the formula V2O3. It is a black solid prepared by reduction of V2O5 with hydrogen or carbon monoxide.[3][4] It is a basic oxide dissolving in acids to give solutions of vanadium (III) complexes.[4] V2O3 has the corundum structure.[4] It is antiferromagnetic with a critical temperature of 160 K. [5] At this temperature there is an abrupt change in conductivity from metallic to insulating.[5] This also distorts the crystal structure to a monoclinic space group: C2/c.[1]

Quick Facts Names, Identifiers ...

Upon exposure to air it gradually converts into indigo-blue V2O4.[5]

In nature it occurs as the rare mineral karelianite.[6]

References

  1. [1]
    Shvets, Petr; Dikaya, Olga; Maksimova, Ksenia; Goikhman, Alexander (2019-05-15). "A review of Raman spectroscopy of vanadium oxides". Journal of Raman Spectroscopy. 50 (8). Wiley: 1226–1244. Bibcode:2019JRSp...50.1226S. doi:10.1002/jrs.5616. ISSN 0377-0486. S2CID 182370875.
  2. [2]
    R. Robie, B. Hemingway, and J. Fisher, “Thermodynamic Properties of Minerals and Related Substances at 298.15K and 1bar Pressure and at Higher Temperatures,” US Geol. Surv., vol. 1452, 1978.
  3. [3]
    Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 1267.
  4. [4]
    Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  5. [5]
    E.M. Page, S.A.Wass (1994),Vanadium:Inorganic and Coordination chemistry, Encyclopedia of Inorganic Chemistry, John Wiley & Sons, ISBN 0-471-93620-0
  6. [6]
    "Karelianite". www.mindat.org.
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