Thallium(I) fluoride

Thallium(I) fluoride, also known as thallous fluoride, is a chemical compound. Its chemical formula is TlF. It has thallium and fluoride ions. The thallium is in its +1 oxidation state. 
Properties.
Thallium(I) fluoride is a white solid. It dissolves easily in water. It also dissolves in ethanol. It absorbs a little water in wet air.
Preparation.
It is made by reacting thallium(I) oxide or thallium(I) carbonate with hydrofluoric acid.