Terbium(III) oxide

Terbium(III) oxide, also known as terbium sesquioxide, is a sesquioxide of the rare earth metal terbium, having chemical formula Tb
2O
3. It is a p-type semiconductor when doped with calcium, and may be prepared by the reduction of Tb
4O
7 in hydrogen at 1300 °C for 24 hours.

It is a p-type semiconductor.

It is a basic oxide and easily dissolved to dilute acids, and then almost colourless terbium salt is formed.

The crystal structure is cubic and the lattice constant is a = 1057 pm.