Cobalt(Ii,Iii) Oxide
From Handwiki _oxide.jpg)
| |
-oxide-unit-cell-2006-CM-perspective-3D-balls.png)
| |
| Names | |
|---|---|
| IUPAC name
cobalt(II) dicobalt(III) oxide
| |
| Other names
cobalt oxide, cobalt(II,III) oxide, cobaltosic oxide, tricobalt tetroxide
| |
| Identifiers | |
CAS Number
|
|
3D model (JSmol)
|
|
| ChemSpider |
|
| EC Number |
|
PubChem CID
|
|
| RTECS number |
|
| UNII |
|
InChI
| |
SMILES
| |
| Properties | |
Chemical formula
|
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) |
Solubility in water
|
Insoluble |
| Solubility | soluble (with degradation) in acids and alkalis |
Magnetic susceptibility (χ)
|
+7380·10−6 cm3/mol |
| Structure | |
Crystal structure
|
cubic |
Space group
|
Fd3m, No. 227[3] |
| Hazards | |
| GHS pictograms |  
|
| GHS Signal word | Danger |
GHS hazard statements
|
H317, H334, H350, H411 |
GHS precautionary statements
|
P261, P273, P284, P304+340, P342+311 |
| NFPA 704 (fire diamond) | 
0
2
0 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
 verify (what is   ?)
| |
| Infobox references | |
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]
Structure
Co3O4 adopts the normal spinel structure, with Co2+ ions in tetrahedral interstices and Co3+ ions in the octahedral interstices of the cubic close-packed lattice of oxide anions.[4]
-oxide-xtal-2006-Co(II)-coord-CM-3D-balls.png) |
125px | -oxide-xtal-2006-O-coord-CM-3D-balls.png)
|
| tetrahedral coordination geometry of Co(II) | distorted octahedral coordination geometry of Co(III) | distorted tetrahedral coordination geometry of O |
Synthesis
Cobalt(II) oxide, CoO, converts to Co3O4 upon heating at around 600–700 °C in air.[4] Above 900 °C, CoO is stable.[4][5] These reactions are described by the following equilibrium:
- 2 Co3O4 ⇌ 6 CoO + O2
Applications
Cobalt(II,III) oxide is used as a blue coloring agent for pottery enamel and glass, as an alternative to cobalt(II) oxide.[6]
Cobalt(II,III) oxide is used as an electrode in some lithium-ion batteries, possibly in the form of cobalt oxide nanoparticles.
Safety
Cobalt compounds are potentially poisonous in large amounts.[7]
See also
- Cobalt(II) oxide
- Cobalt(III) oxide
References
- ↑ "Cobalt(II,III) oxide 203114". https://www.sigmaaldrich.com/catalog/product/aldrich/203114.
- ↑ Lide, David R., ed (2006). CRC Handbook of Chemistry and Physics (87th ed.). Boca Raton, FL: CRC Press. ISBN 0-8493-0487-3.
- ↑ "mp-18748: Co3O4 (cubic, Fd-3m, 227)". https://materialsproject.org/materials/mp-18748/.
- ↑ 4.0 4.1 4.2 4.3 Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 1118. ISBN 978-0-08-037941-8.
- ↑ Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. p. 1520.
- ↑ Frank Hamer, Janet Hamer (2004): The Potter's Dictionary of Materials and Techniques. University of Pennsylvania Press; 437 pp. ISBN:0812238109
- ↑ MSDS[yes|permanent dead link|dead link}}]
 |  |
Categories: [Cobalt compounds] [Mixed valence compounds] [Transition metal oxides]
↧ Download as ZWI file | Last modified: 04/15/2024 11:36:32 | 13 views
☰ Source: https://handwiki.org/wiki/Chemistry:Cobalt(II,III)_oxide | License: CC BY-SA 3.0
KSF