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Vanadium(III) oxide

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Title: Vanadium(III) oxide  
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Subject: Vanadium(IV) oxide, Oxides, Vanadium compounds, Sesquioxides, Vanadium carbide
Collection: Hematite Group, Oxides, Sesquioxides, Vanadium Compounds
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Vanadium(III) oxide

Vanadium(III) oxide
Vanadium trioxide
Other names
Vanadium sesquioxide, Vanadic oxide
RTECS number YW3050000
Molar mass 149.881 g/mol
Appearance Black powder
Density 4.87 g/cm3
Melting point 1,940 °C (3,520 °F; 2,210 K)
Solubility in other solvents Insoluble
Trigonal (karelianite), hR30
R-3c h, No. 167
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
 Y  (: Y/N?)

Vanadium(III) oxide is the 5O2V with hydrogen or carbon monoxide.[1][2]It is a basic oxide dissolving in acids to give solutions of vanadium(III) complexes.[2] V2O3 has the corundum structure.[2] It is antiferromagnetic with a critical temperature of 160 K. [3] At this temperature there is an abrupt change in conductivity from metallic to insulating.[3]

Upon exposure to air it gradually converts into indigo-blue V2O4.[3]

In nature it occurs as the very rare mineral karelianite.


  1. ^ Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 1267.
  2. ^ a b c  
  3. ^ a b c E.M. Page, S.A.Wass (1994),Vanadium:Inorganic and Coordination chemistry, Encyclopedia of Inorganic Chemistry, John Wiley & Sons, ISBN 0-471-93620-0
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