Thallium(I) fluoride

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Thallium(I) fluoride
Preferred IUPAC name
Thallium(I) fluoride[citation needed]
Other names
Thallium monofluoride[citation needed]
Thallous fluoride[citation needed]
3D model (Jmol)
ECHA InfoCard 100.029.231
EC Number 232-154-1
RTECS number XG4900000
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)
78.6 g dm−3 (at 15 °C)[1]
Solubility slightly soluble in ethanol
−44.4·10−6 cm3/mol
Orthorhombic, oP8
Fmmm, No. 28
Very Toxic T+ Dangerous for the Environment (Nature) N
R-phrases R26/28, R33, R51/53
S-phrases S13, S28, S45, S61[2]
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).
N verify (what is YesYN ?)
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,[3][4] due to the 6s2 inert pair on Tl+.[5]

Thallium(I) fluoride is unusual among the thallium(I) halides in that it is very soluble in water, while the others are not.[6]


Thallium(I) fluoride can be prepared by the reaction of thallium(I) carbonate with hydrofluoric acid.[3]


  1. ^ 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 
  2. ^ "399833 Thallium(I) fluoride 99%". Sigma-Aldrich. Retrieved 2008-06-17. 
  3. ^ 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 
  4. ^ 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 
  5. ^ 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. 
  6. ^ Arora, M. G. (2003), P-block Elements, Anmol Publications, p. 35, ISBN 81-7488-563-3, retrieved 2008-06-17