Chromium(II) oxide

Chromium(II) oxide
IUPAC name chromium(II) oxide
Identifiers
CAS number	12018-00-7 Y
Properties
Molecular formula	CrO
Molar mass	67.996 g/mol
Appearance	black
Melting point	300 °C (decomp.)
Structure
Crystal structure	cubic, cF8
Space group	Fm3m, No. 225
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Chromium(II) oxide (CrO) is an inorganic compound composed of chromium and oxygen.^[1] It is a black powder that crystallises in the rock salt structure.^[2] Hypophosphites may reduce chromium(III) oxide to chromium(II) oxide:

H₃PO₂ + 2 Cr₂O₃ → 4 CrO + H₃PO₄

It is readily oxidized by the atmosphere.

See also

• Chromium(III) oxide
• Chromium(IV) oxide
• Chromium(VI) oxide

References

1. ^ Satish. Anand, Raj. Kumar (1989), Dictionary of Inorganic Chemistry, Anmol Publications, ISBN 9788170412366, http://books.google.com/?id=6yDA6nb5KCUC&pg=PA65&lpg=PA65&dq=%22Chromium(II)+oxide%22 
2. ^ Egon Wiberg, Arnold Frederick Holleman (2001) Inorganic Chemistry, Elsevier ISBN 0123526515