Ammonium hexafluoroferrate

Ammonium hexafluoroferrate
Names
	IUPAC name triazanium;hexafluoroiron(3-)
	Other names Triammonium hexafluoroferrate(3-), ammonium fluoroferrate(III), ammonium hexafluoroferrate(III)
Identifiers
CAS Number	13815-28-6;
3D model (JSmol)	Interactive image;
ChemSpider	24491;
PubChem CID	26287;
CompTox Dashboard (EPA)	DTXSID70160504;
	InChI InChI=1S/6FH.Fe.3H3N/h61H;;31H3/q;;;;;;+3;;;/p-3 Key: UKKZLCVDDRMWPG-UHFFFAOYSA-K;
	SMILES [NH4+].[NH4+].[NH4+].F[Fe-3](F)(F)(F)(F)F;
Properties
Chemical formula	F6FeH12N3
Molar mass	223.952 g·mol−1
Appearance	yellow-white crystals
Density	1.96 g/cm3
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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Ammonium hexafluoroferrate is an inorganic chemical compound with the chemical formula (NH₄)₃FeF₆.^[1]^[2]^[3]

Synthesis

Ammonium hexafluoroferrate can be obtained by reacting ferric fluoride trihydrate and ammonium fluoride in water.^[4]

Physical properties

Ammonium hexafluoroferrate is isomorphous with the analogous compounds of aluminum and trivalent titanium, vanadium, and chromium.^[5] It crystallizes in a cubic lattice.^[6]

The compound's thermal decomposition products are ferrous fluoride and ferric fluoride.^[7]

Chemical properties

The compound reacts with xenon difluoride to produce NH₄FeF₄, N₂, Xe, and HF.^[8]

Uses

Ammonium hexafluoroferrate is used as a fire retardant.^[9]

References

^ Shinn, Dennis B.; Crocket, David S.; Haendler, Helmut M. (November 1966). "The Thermal Decomposition of Ammonium Hexafluoroferrate(III) and Ammonium Hexafluoroaluminate. A New Crystalline Form of Aluminum Fluoride". Inorganic Chemistry. 5 (11): 1927–1933. doi:10.1021/ic50045a020. ISSN 0020-1669. Retrieved 22 August 2024.
^ Moriya, Keiichi; Matsuo, Takasuke; Suga, Hiroshi; Seki, Syûzô (1 August 1977). "On the Phase Transition of Ammonium Hexafluoroferrate(III)". Bulletin of the Chemical Society of Japan. 50 (8): 1920–1926. doi:10.1246/bcsj.50.1920. Retrieved 22 August 2024.
^ Pebler, Jurgen (January 1985). "Iron(57) Mo¨ssbauer effect and spin correlation time in ammonium hexafluoroferrate(III)". Journal of Solid State Chemistry. 56 (1): 58–65. Bibcode:1985JSSCh..56...58P. doi:10.1016/0022-4596(85)90252-X. Retrieved 22 August 2024.
^ Slivnik, Jože; Družina, Branko; Žemva, Boris (1 November 1981). "Reactions of Some Ammonium Fluorometalates with XeF 2". Zeitschrift für Naturforschung B. 36 (11): 1457–1460. doi:10.1515/znb-1981-1119.
^ Simons, J. H. (2 December 2012). Fluorine Chemistry V2. Elsevier. p. 20. ISBN 978-0-323-14543-5. Retrieved 22 August 2024.
^ Ryss, Iosif Grigorʹevich (1960). The Chemistry of Fluorine and Its Inorganic Compounds. State Publishing House for Scientific, Technical and Chemical Literature. p. 681. Retrieved 22 August 2024.
^ Wang, Hong; Zhou, Yuebo; Mo, Chenggang; Zhang, Lina; Cui, Junjun (1 December 2021). "Fluorination of α-Fe2O3 by NH4HF2 to Produce FeF3". Russian Journal of Inorganic Chemistry. 66 (14): 2017–2026. doi:10.1134/S0036023621140060. ISSN 1531-8613. Retrieved 25 August 2024.
^ Slivnik, Jože; Družina, Branko; Žemva, Boris (1 November 1981). "Reactions of Some Ammonium Fluorometalates with XeF 2". Zeitschrift für Naturforschung B. 36 (11): 1457–1460. doi:10.1515/znb-1981-1119.
^ Official Gazette of the United States Patent Office: Patents. The United States Patent Office. 4 January 1972. p. 781. Retrieved 22 August 2024.

[1] Shinn, Dennis B.; Crocket, David S.; Haendler, Helmut M. (November 1966). "The Thermal Decomposition of Ammonium Hexafluoroferrate(III) and Ammonium Hexafluoroaluminate. A New Crystalline Form of Aluminum Fluoride". Inorganic Chemistry. 5 (11): 1927–1933. doi:10.1021/ic50045a020. ISSN 0020-1669. Retrieved 22 August 2024.

[2] Moriya, Keiichi; Matsuo, Takasuke; Suga, Hiroshi; Seki, Syûzô (1 August 1977). "On the Phase Transition of Ammonium Hexafluoroferrate(III)". Bulletin of the Chemical Society of Japan. 50 (8): 1920–1926. doi:10.1246/bcsj.50.1920. Retrieved 22 August 2024.

[3] Pebler, Jurgen (January 1985). "Iron(57) Mo¨ssbauer effect and spin correlation time in ammonium hexafluoroferrate(III)". Journal of Solid State Chemistry. 56 (1): 58–65. Bibcode:1985JSSCh..56...58P. doi:10.1016/0022-4596(85)90252-X. Retrieved 22 August 2024.

[4] Slivnik, Jože; Družina, Branko; Žemva, Boris (1 November 1981). "Reactions of Some Ammonium Fluorometalates with XeF 2". Zeitschrift für Naturforschung B. 36 (11): 1457–1460. doi:10.1515/znb-1981-1119.

[5] Simons, J. H. (2 December 2012). Fluorine Chemistry V2. Elsevier. p. 20. ISBN 978-0-323-14543-5. Retrieved 22 August 2024.

[6] Ryss, Iosif Grigorʹevich (1960). The Chemistry of Fluorine and Its Inorganic Compounds. State Publishing House for Scientific, Technical and Chemical Literature. p. 681. Retrieved 22 August 2024.

[7] Wang, Hong; Zhou, Yuebo; Mo, Chenggang; Zhang, Lina; Cui, Junjun (1 December 2021). "Fluorination of α-Fe2O3 by NH4HF2 to Produce FeF3". Russian Journal of Inorganic Chemistry. 66 (14): 2017–2026. doi:10.1134/S0036023621140060. ISSN 1531-8613. Retrieved 25 August 2024.

[8] Slivnik, Jože; Družina, Branko; Žemva, Boris (1 November 1981). "Reactions of Some Ammonium Fluorometalates with XeF 2". Zeitschrift für Naturforschung B. 36 (11): 1457–1460. doi:10.1515/znb-1981-1119.

[9] Official Gazette of the United States Patent Office: Patents. The United States Patent Office. 4 January 1972. p. 781. Retrieved 22 August 2024.

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