Iron tetrafluoride
Other names
Iron(IV) fluoride
3D model (JSmol)
  • InChI=1S/Fe.4FH/h;4*1H/q+4;;;;/p-4
  • F[Fe](F)(F)F
GHS labelling:
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Iron tetrafluoride is a binary inorganic compound with a chemical formula of FeF4.[1]


Iron tetrafluoride was initially observed in 2003 via mass spectrometry and Fourier-transform infrared spectroscopy.[2]


Iron tetrafluoride can be prepared by reaction of iron atoms with elemental F2 in excess neon and argon at 4 K:[2][3]

Fe + 2F2 → FeF4

Physical properties

Iron tetrafluoride is assumed to have tetrahedral or square planar structure.[2] It has been calculated to be stable in the gas phase.[4]


  1. ^ Russian Journal of Physical Chemistry. British Library Lending Division. July 1992. p. 1389. Retrieved 12 February 2024.
  2. ^ a b c Comprehensive Inorganic Chemistry II: From Elements to Applications. Newnes. 23 July 2013. p. 199. ISBN 978-0-08-096529-1. Retrieved 12 February 2024.
  3. ^ Schlöder, Tobias; Vent-Schmidt, Thomas; Riedel, Sebastian (26 November 2012). "A Matrix-Isolation and Quantum-Chemical Investigation of FeF 4". Angewandte Chemie International Edition. 51 (48): 12063–12067. doi:10.1002/anie.201206464. ISSN 1433-7851. PMID 23097315. Retrieved 12 February 2024.
  4. ^ Haupt, Axel (22 March 2021). Organic and Inorganic Fluorine Chemistry: Methods and Applications. Walter de Gruyter GmbH & Co KG. p. 297. ISBN 978-3-11-065950-4. Retrieved 12 February 2024.