Vanadium(II) oxide

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Vanadium(II) oxide
CAS number 12035-98-2 YesY
PubChem 24411
Molecular formula VO
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)
Refractive index (nD) 1.5763
Crystal structure Halite (cubic), cF8
Space group Fm3m, No. 225
Octahedral (V2+)
Octahedral (O2−)
EU Index Not listed
Flash point Non-flammable
Related compounds
Other anions Vanadium monosulfide
Vanadium monoselenide
Vanadium monotelluride
Other cations Niobium(II) oxide
Tantalum(II) oxide
Related vanadium oxides Vanadium(III) oxide
Vanadium(IV) oxide
Vanadium(V) oxide
Except where noted otherwise, 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.[1]


  1. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 982. ISBN 0080379419.