Ammonium hexafluorozirconate

Ammonium hexafluorozirconate
Names
	Other names Diammonium hexafluorozirconate(2-), diammonium hexafluorozirconate, bis(ammonium) hexafluorozirconate(2-)
Identifiers
CAS Number	16919-31-6 ;
3D model (JSmol)	Interactive image;
ChemSpider	11221763;
ECHA InfoCard	100.037.231
EC Number	240-970-4;
PubChem CID	46173004;
CompTox Dashboard (EPA)	DTXSID40937604 ;
	InChI InChI=1S/6FH.2H3N.Zr/ h61H;21H3;/q;;;;;;;;+4/p-4 Key: LPFRXGDQGULMEN-UHFFFAOYSA-J;
	SMILES [NH4+].[NH4+].F[Zr-2](F)(F)(F)(F)F;
Properties
Chemical formula	F6H8N2Zr
Molar mass	241.292 g·mol−1
Appearance	White Powder
Density	1.15 g/cm3
Structure
Crystal structure	orthorhombic
Space group	Pca21
Lattice constant	a = 13.398 Å, b = 7.739 Å, c = 11.680 Å
Lattice volume (V)	1211.1 Å3
Formula units (Z)	8 units per cell
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H311, H314, H315, H317, H319, H331, H335, H372, H412
Precautionary statements	P260, P262, P264, P264+P265, P270, P271, P272, P273, P280, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P351+P338, P305+P354+P338, P316, P317, P319, P321, P330, P333+P317, P337+P317, P361+P364, P362+P364, P363, P403+P233, P405, P501
Related compounds
Other cations	Lithium hexafluorozirconate; Sodium hexafluorozirconate; Potassium hexafluorozirconate;
Related compounds	Hexafluorozirconic acid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Ammonium hexafluorozirconate is a complex inorganic compound of nitrogen, hydrogen, fluorine, and zirconium with the chemical formula (NH₄)₂ZrF₆.^[3] It is the ammonium salt of hexafluorozirconic acid.

Preparation

Ammonium hexafluorozirconate can be prepared by adding ammonium fluoride solution to zirconium oxide solution in hydrofluoric acid.^[4]

Uses

Ammonium hexafluorozirconate is used in anti-corrosion treatment of metals; it forms ultrafine metal powder by thermal decomposition. It is also used as an additive in dental impression materials.^[5]

Ammonium hexafluorozirconate is of research interest for the treatment of silica substrates used in the activation of metallocene catalysts. The hexafluorozirconate anion is suitable because it contains a Lewis acidic metal.^[6]

Related compounds

Several mixed ammonium hexafluorozirconates with alkali metal cations isomorphously replacing ammonium have been characterized.^[7]^[8]

An ammonium heptafluorozirconate ((NH₄)₃ZrF₇) has also been characterized.^[9]

References

^ Zalkin, A.; Eimerl, D.; Velsko, S. P. (1988-12-15). "Diammonium hexafluorozirconate". Acta Crystallographica Section C: Crystal Structure Communications. 44 (12): 2050–2051. doi:10.1107/S0108270188008303. ISSN 0108-2701.
^ "Ammonium hexafluorozirconate". pubchem.ncbi.nlm.nih.gov.
^ Haynes, William M. (2016). CRC Handbook of Chemistry and Physics. CRC Press. p. 4-47. ISBN 9781439880500. Retrieved 27 February 2024.
^ Haendler, Helmut M.; Wheeler, Charles M.; Robinson, Dean W. (May 1952). "The Thermal Decomposition of Ammonium Heptafluorozirconate(IV)¹". Journal of the American Chemical Society. 74 (9): 2352–2353. doi:10.1021/ja01129a050. ISSN 1520-5126 0002-7863, 1520-5126. Retrieved 2026-03-18. {{cite journal}}: Check |issn= value (help)
^ Daniel, F. M.; Macintyre, Jane Elizabeth; Stirling, V. M. (1992). Dictionary of Inorganic Compounds Volume 1. Chapman & Hall. p. 3239. ISBN 978-0-412-30120-9. Retrieved 27 February 2024.
^ Chadwick, John C.; Severn, John R. (25 June 2008). Tailor-Made Polymers: Via Immobilization of Alpha-Olefin Polymerization Catalysts. Wiley. pp. 171–178. ISBN 9783527621675. Retrieved 27 February 2024.
^ Gerasimenko, A. V.; Tkachenko, I. A.; Kavun, V. Ya.; Didenko, N. A.; Sergienko, V. I. (2006-01-01). "Synthesis and complex investigation of potassium ammonium hexafluorozirconates: I. Synthesis and X-ray diffraction study of K2-x(NH4)xZrF6 (0 < x < 2) crystals". Russian Journal of Inorganic Chemistry. 51 (1): 9–22. doi:10.1134/S0036023606010037. ISSN 0036-0236.
^ Kavun, V. Ya.; Gerasimenko, A. V.; Slobodyuk, A. B.; Didenko, N. A.; Uvarov, N. F.; Sergienko, V. I. (2007-05-01). "Ionic mobility and structure of fluorozirconates Rb2−x(NH4)xZrF6 (x > 1.5) by NMR, x-ray structure analysis, and impedance spectroscopy". Russian Journal of Electrochemistry. 43 (5): 537–544. doi:10.1134/S1023193507050060. ISSN 1608-3342.
^ Hurst, H. J.; Taylor, J. C. (1970-04-15). "The crystal structure of ammonium heptafluorozirconate and the disorder of the heptafluorozirconate ion". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry. 26 (4): 417–421. doi:10.1107/S0567740870002480. ISSN 0567-7408.

[1] Zalkin, A.; Eimerl, D.; Velsko, S. P. (1988-12-15). "Diammonium hexafluorozirconate". Acta Crystallographica Section C: Crystal Structure Communications. 44 (12): 2050–2051. doi:10.1107/S0108270188008303. ISSN 0108-2701.

[2] "Ammonium hexafluorozirconate". pubchem.ncbi.nlm.nih.gov.

[3] Haynes, William M. (2016). CRC Handbook of Chemistry and Physics. CRC Press. p. 4-47. ISBN 9781439880500. Retrieved 27 February 2024.

[4] Haendler, Helmut M.; Wheeler, Charles M.; Robinson, Dean W. (May 1952). "The Thermal Decomposition of Ammonium Heptafluorozirconate(IV)¹". Journal of the American Chemical Society. 74 (9): 2352–2353. doi:10.1021/ja01129a050. ISSN 1520-5126 0002-7863, 1520-5126. Retrieved 2026-03-18. {{cite journal}}: Check |issn= value (help)

[5] Daniel, F. M.; Macintyre, Jane Elizabeth; Stirling, V. M. (1992). Dictionary of Inorganic Compounds Volume 1. Chapman & Hall. p. 3239. ISBN 978-0-412-30120-9. Retrieved 27 February 2024.

[6] Chadwick, John C.; Severn, John R. (25 June 2008). Tailor-Made Polymers: Via Immobilization of Alpha-Olefin Polymerization Catalysts. Wiley. pp. 171–178. ISBN 9783527621675. Retrieved 27 February 2024.

[7] Gerasimenko, A. V.; Tkachenko, I. A.; Kavun, V. Ya.; Didenko, N. A.; Sergienko, V. I. (2006-01-01). "Synthesis and complex investigation of potassium ammonium hexafluorozirconates: I. Synthesis and X-ray diffraction study of K2-x(NH4)xZrF6 (0 < x < 2) crystals". Russian Journal of Inorganic Chemistry. 51 (1): 9–22. doi:10.1134/S0036023606010037. ISSN 0036-0236.

[8] Kavun, V. Ya.; Gerasimenko, A. V.; Slobodyuk, A. B.; Didenko, N. A.; Uvarov, N. F.; Sergienko, V. I. (2007-05-01). "Ionic mobility and structure of fluorozirconates Rb2−x(NH4)xZrF6 (x > 1.5) by NMR, x-ray structure analysis, and impedance spectroscopy". Russian Journal of Electrochemistry. 43 (5): 537–544. doi:10.1134/S1023193507050060. ISSN 1608-3342.

[9] Hurst, H. J.; Taylor, J. C. (1970-04-15). "The crystal structure of ammonium heptafluorozirconate and the disorder of the heptafluorozirconate ion". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry. 26 (4): 417–421. doi:10.1107/S0567740870002480. ISSN 0567-7408.

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