Cobalt(II,III) oxide

Cobalt(II,III) oxide[1]
Cobalt(II,III) oxide
Ball-and-stick model of the unit cell of Co3O4
Names
IUPAC name
cobalt(II) dicobalt(III) oxide
Other names
cobalt oxide, cobalt(II,III) oxide, cobaltosic oxide, tricobalt tetroxide
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.780 Edit this at Wikidata
EC Number
  • 215-157-2
RTECS number
  • GG2500000
UNII
  • InChI=1S/3Co.4O checkY
    Key: LBFUKZWYPLNNJC-UHFFFAOYSA-N checkY
  • InChI=1/3Co.4O/rCo2O3.CoO/c3-1-5-2-4;1-2
    Key: LBFUKZWYPLNNJC-PMPQCLQHAA
  • [Co]=O.O=[Co]O[Co]=O
Properties
Co3O4

CoO.Co2O3

Molar mass 240.80 g/mol
Appearance black solid
Density 6.07 g/cm3[2]
Melting point 895 °C (1,643 °F; 1,168 K)
Boiling point 900 °C (1,650 °F; 1,170 K) (decomposes)
Insoluble
Solubility soluble (with degradation) in acids and alkalis
+7380·10−6 cm3/mol
Structure
cubic
Fd3m, No. 227[3]
Hazards
GHS labelling:
GHS09: Environmental hazardGHS08: Health hazard
Danger
H317, H334, H350, H411
P261, P273, P284, P304+P340, P342+P311
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
2
0
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Cobalt(II,III) oxide is an inorganic compound with the formula Co3O4. It is one of two well characterized cobalt oxides. It is a black antiferromagnetic solid. As a mixed valence compound, its formula is sometimes written as CoIICoIII2O4 and sometimes as CoO•Co2O3.[4]

  1. ^ "Cobalt(II,III) oxide 203114". Sigma-Aldrich.
  2. ^ Lide, David R., ed. (2006). CRC Handbook of Chemistry and Physics (87th ed.). Boca Raton, FL: CRC Press. ISBN 0-8493-0487-3.
  3. ^ "mp-18748: Co3O4 (cubic, Fd-3m, 227)". materialsproject.org. Retrieved 2019-12-20.
  4. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 1118. ISBN 978-0-08-037941-8.