Cobalt(II,III) oxide
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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]
Quick Facts Names, Identifiers ...
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IUPAC name
cobalt(II) dicobalt(III) oxide | |
Other names
cobalt oxide, cobalt(II,III) oxide, cobaltosic oxide, tricobalt tetroxide | |
Identifiers | |
3D model (JSmol) |
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ECHA InfoCard | 100.013.780 |
EC Number |
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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 | |
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Danger | |
H317, H334, H350, H411 | |
P261, P273, P284, P304+P340, P342+P311 | |
NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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