Vanadium(II) oxide

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Vanadium(II) oxide
IUPAC name
Vanadium(II) oxide
Other names
Vanadium oxide
ECHA InfoCard 100.031.655
Molar mass 66.9409 g/mol
Appearance grey solid with metallic lustre
Density 5.758 g/cm3
Melting point 1,789 °C (3,252 °F; 2,062 K)
Boiling point 2,627 °C (4,761 °F; 2,900 K)
Halite (cubic), cF8
Fm3m, No. 225
Octahedral (V2+)
Octahedral (O2−)
39.01 J/mol·K[1]
-431.790 kJ/mol[1]
-404.219 kJ/mol[1]
Flash point Non-flammable
Related compounds
Other anions
Vanadium monosulfide
Vanadium monoselenide
Vanadium monotelluride
Other cations
Niobium(II) oxide
Tantalum(II) oxide
Vanadium(III) oxide
Vanadium(IV) oxide
Vanadium(V) oxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Vanadium(II) oxide, VO, is one of the many oxides of vanadium. VO is a long-lived, electronically neutral reagent chemical. It adopts a distorted NaCl structure and contains weak V−V metal to metal bonds. As shown by band theory, VO is a conductor of electricity due to its partially filled conduction band and delocalisation of electrons in the t2g orbitals. VO is a non-stoichiometric compound, its composition varying from VO0.8 to VO1.3.[2]


  1. ^ a b c 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.
  2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 982. ISBN 978-0-08-037941-8.