Titanium(III) oxide is the

inorganic compound In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemis ...

with the formula Ti₂ O₃. A black semiconducting solid, it is prepared by reducing

titanium dioxide Titanium dioxide, also known as titanium(IV) oxide or titania , is the inorganic compound with the chemical formula . When used as a pigment, it is called titanium white, Pigment White 6 (PW6), or CI 77891. It is a white solid that is insolu ...

with titanium metal at 1600 °C. Ti₂O₃ adopts the Al₂O₃ (corundum) structure. It is reactive with oxidising agents. At around 200 °C there is a transition from semiconducting to metallic conducting. Titanium(III) oxide occurs naturally as the extremely rare mineral tistarite. Other titanium(III) oxides include LiTi₂O₄ and LiTiO₂.

References

Titanium(III) compounds Sesquioxides Transition metal oxides Semiconductor materials {{inorganic-compound-stub