Thallium(I) bromide Thallium(I) iodide Indium(III) fluoride Thallium(III) fluoride Thallium(I) fluoride is the inorganic compound with the formula TlF.

It is a white solid, forming orthorhombic crystals.

[1] It has a distorted sodium chloride (rock salt) crystal structure,[3][4] due to the 6s2 inert pair on Tl+.

[5] This salt is unusual among the thallium(I) halides in that it is very soluble in water.

[6] Thallium(I) fluoride can be prepared by the reaction of thallium(I) carbonate with hydrofluoric acid.