Thallium(I) fluoride

Thallium(I) fluoride

Names
Preferred IUPAC name Thallium(I) fluoride
Other names Thallium monofluoride Thallous fluoride
Identifiers
CAS Number	7789-27-7 Y
ChemSpider	56426 N
EC Number	232-154-1
Jmol 3D model	Interactive image
PubChem	62675
RTECS number	XG4900000
InChI InChI=1S/FH.Tl/h1H;/q;+1/p-1 N Key: CULOEOTWMUCRSJ-UHFFFAOYSA-M N
SMILES F[Tl]
Properties
Chemical formula	TlF2•
Molar mass	223.3817 g/mol
Appearance	White crystals
Density	8.36 g cm−3
Melting point	327 °C (621 °F; 600 K)
Boiling point	655 °C (1,211 °F; 928 K) (decomposes)
Solubility in water	78.6 g dm−3 (at 15 °C)
Solubility	slightly soluble in ethanol
Structure
Crystal structure	Orthorhombic, oP8
Space group	Fmmm, No. 28
Vapor pressure	{{{value}}}
Related compounds
Other anions	Thallium(I) chloride Thallium(I) bromide Thallium(I) iodide
Other cations	Gallium(III) fluoride Indium(III) fluoride Thallium(III) fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Thallium(I) fluoride (or thallous fluoride or thallium monofluoride) is the chemical compound composed of thallium and fluorine with the formula TlF. It consists of hard white orthorhombic crystals which are slightly deliquescent in humid air but revert to the anhydrous form in dry air. It has a distorted sodium chloride (rock salt) crystal structure, due to the 6s² inert pair on Tl⁺.

Thallium(I) fluoride is unusual among the thallium(I) halides in that it is very soluble in water, while the others are not.

Reactions

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