Thulium(III) fluoride
3D model (JSmol)
ECHA InfoCard 100.033.943 Edit this at Wikidata
EC Number
  • 237-353-7
  • InChI=1S/3FH.Tm/h3*1H;/q;;;+3/p-3
  • F[Tm](F)F
GHS labelling:
GHS06: ToxicGHS07: Exclamation mark
H301, H311, H315, H319, H331, H335
P261, P264, P270, P271, P280, P301+P310, P302+P352, P304+P340, P305+P351+P338, P311, P312, P321, P322, P330, P332+P313, P337+P313, P361, P362, P363, P403+P233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Thullium(III) fluoride is an inorganic compound with the chemical formula TmF3.


It can be produced by reacting thulium(III) sulfide and hydrofluoric acid, followed by thermal decomposition:[1]

3 Tm2S3 + 20 HF + (2 + 2x)H2O → 2 (H3O)Tm3F10·xH2O↓ + 9 H2S↑ (x=1.7)
(H3O)Tm3F10 → 3 TmF3 + HF↑ + H2O↑

Thulium(III) oxide reacts with fluorinating agents such as hydrogen fluoride,[2] nitrogen trifluoride[3] xenon difluoride[4] to create thullium(III) fluoride as well, although the reaction with nitrogen trifluoride is incomplete and produces a mixture of TmOF and TmF3.[3]


  1. ^ O.V. Andrrev, I.A. Razumkova, A.N. Boiko (March 2018). "Synthesis and thermal stability of rare earth compounds REF3, REF3·nH2O and (H3O)RE3F10·nH2O (RE = Tb − Lu, Y), obtained from sulphide precursors". Journal of Fluorine Chemistry. 207: 77–83. doi:10.1016/j.jfluchem.2017.12.001. Retrieved 2019-03-26.((cite journal)): CS1 maint: multiple names: authors list (link)
  2. ^ Georg Brauer (Hrsg.), unter Mitarbeit von Marianne Baudler u. a.: Handbuch der Präparativen Anorganischen Chemie. 3., umgearbeitete Auflage. Band I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6, S. 254.
  3. ^ a b Randall D. Scheele, Bruce K. McNamara, Andrew M. Casella, Anne E. Kozelisky, Doinita Neiner (February 2013). "Thermal NF3 fluorination/oxidation of cobalt, yttrium, zirconium, and selected lanthanide oxides". Journal of Fluorine Chemistry. 146: 86–97. doi:10.1016/j.jfluchem.2012.12.013. Retrieved 2019-03-26.((cite journal)): CS1 maint: multiple names: authors list (link)
  4. ^ Brekhovskikh, M. N.; Popov, A. I.; Kiselev, Yu. M.; Fedorov, V. A.; Sobolev, B. P. Interaction of xenon difluoride with rare earth element, zirconium, and hafnium oxides(in Russian). Vysokochistye Veshchestva, 1987. 5: 83-86. ISSN 0235-0122.