Thallium(I) fluoride

Thallium(I) fluoride
Names
	Preferred IUPAC name Thallium(I) fluoride[citation needed]
	Other names Thallium monofluoride[citation needed]; Thallous fluoride[citation needed]
Identifiers
CAS Number	7789-27-7 ;
3D model (JSmol)	Interactive image;
ChemSpider	56426 ;
ECHA InfoCard	100.029.231
EC Number	232-154-1;
PubChem CID	62675;
RTECS number	XG4900000;
UNII	GV4Y14VZLX ;
CompTox Dashboard (EPA)	DTXSID701027537 ;
	InChI InChI=1S/FH.Tl/h1H;/q;+1/p-1 Key: CULOEOTWMUCRSJ-UHFFFAOYSA-M ;
	SMILES F[Tl];
Properties
Chemical formula	TlF
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/100 mL (at 15 °C)
Solubility	slightly soluble in ethanol
Magnetic susceptibility (χ)	−44.4·10−6 cm3/mol
Structure
Crystal structure	Orthorhombic, oP8
Space group	Fmmm, No. 28
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). verify (what is ?) 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.^[1] It has a distorted sodium chloride (rock salt) crystal structure,^[2]^[3] due to the 6s² inert pair on Tl⁺.^[4]

Thallium(I) fluoride is unusual among the thallium(I) halides in that it is very soluble in water, while the others are not.^[5]

Reactions

Thallium(I) fluoride can be prepared by the reaction of thallium(I) carbonate with hydrofluoric acid.^[2]

At 928 K, TlF decomposes to its elements:

\mathrm {2\ TlF\rightarrow 2\ Tl+F_{2}}

^[6]

^ ^a ^b Perry, Dale L.; Phillips, Sidney L. (1995), Handbook of Inorganic Compounds, CRC Press, p. 407, ISBN 0-8493-8671-3, retrieved 2008-06-17
^ ^a ^b Wiberg, Nils; Wiberg, Egon; Holleman, A. F. (2001), Inorganic Chemistry, Academic Press, p. 1037, ISBN 0-12-352651-5, retrieved 2008-06-17
^ Meyer, Gerd; Naumann, Dieter; Wesemann, Lars (2006), Inorganic Chemistry in Focus III, Wiley-VCH, p. 21, ISBN 3-527-31510-1, retrieved 2008-06-17
^ Berastegui, P.; Hull, S. (2000). "The Crystal Structures of Thallium(I) Fluoride". Journal of Solid State Chemistry. 150 (2): 266. doi:10.1006/jssc.1999.8587.
^ Arora, M. G. (2003), P-block Elements, Anmol Publications, p. 35, ISBN 81-7488-563-3, retrieved 2008-06-17
^ https://www.americanelements.com/thallium-i-fluoride-7789-27-7