Thallium(I) fluoride
Preferred IUPAC name
Thallium(I) fluoride
Other names
Thallium monofluoride
Thallous fluoride
3D model (JSmol)
ECHA InfoCard 100.029.231 Edit this at Wikidata
EC Number
  • 232-154-1
RTECS number
  • XG4900000
  • InChI=1S/FH.Tl/h1H;/q;+1/p-1 ☒N
  • F[Tl]
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/100 mL (at 15 °C)[1]
Solubility slightly soluble in ethanol
−44.4·10−6 cm3/mol
Orthorhombic, oP8
Fmmm, No. 28
GHS labelling:
GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
H300, H330, H373, H411
P260, P264, P270, P271, P273, P284, P301+P310, P304+P340, P310, P314, P320, P321, P330, P391, P403+P233, P405, P501
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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Thallium(I) fluoride is the inorganic compound with the formula TlF. It is a white solid, forming orthorhombic crystals. The solid is slightly deliquescent.[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.[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. Bibcode:2000JSSCh.150..266B. 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