Tricobalt Tetroxide (Cobalt Oxide) (Co3O4)-Pellets

Characteristic

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 Co^IICo^III₂O₄ and sometimes as CoO•Co₂O₃.

Chemical formula：Co₃O₄

                                CoO.Co₂O₃

Molar mass：240.80 g/mol

Appearance：black solid

Density：6.11 g/cm³

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 in acids and alkalis

Magnetic susceptibility (χ)：+7380·10⁻⁶ cm³/mol

Crystal structure：cubic

Application

Cobalt(II,III) oxide is used as a blue coloring agent for pottery enamel and glass, as an alternative to cobalt(II) oxide.

Cobalt(II,III) oxide is used as an electrode in some lithium-ion batteries, possibly in the form of cobalt oxide nanoparticles.