Thallium(III) oxide

Thallium(III) oxide, also known as thallic oxide, is a chemical compound. Its chemical formula is Tl2O3. It has thallium and oxide ions in it. The thallium is in its +3 oxidation state.
Properties.
Thallium(III) oxide is a white powder. It is very heavy and very toxic. It is a semiconductor. It reacts with acids to make other toxic thallium compounds. It does not dissolve in water.
Preparation.
It is made by oxidation of thallium(I) oxide.
Uses.
It may be used in solar cells.