Tellurite

Tellurite is an ion. Its chemical formula is TeO₃^2-. They are some of the more stable tellurium compounds. They are weak oxidizing agents. In slightly acidic conditions, it makes hydrogen tellurite, HTeO₃^-. When it is very acidic, it makes tellurous acid. They are normally made by reacting tellurium dioxide with a metal oxide.

Tellurite as a mineral

Tellurite is also a rare mineral. This mineral consists of tellurium dioxide. It is a yellow to white mineral. It is in areas that tend to oxidize minerals (oxidation zone). Otherwise telluride or native tellurium would be there.