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CAS Number: 1308-06-1
Linear Formula: Co3O4
Molecular Weight: 240.80
IUPAC Name: Cobalt(II) dicobalt(III) oxide
Other Names: Cobalt oxide, Cobalt(II,III) oxide, Cobaltosic oxide, Tricobalt tetroxide
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.
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.