Potassium hexafluorozirconate
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Names
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Other names
dipotassium hexafluorozirconate, potassium zirconium hexafluoride, potassium fluorozirconate
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Identifiers
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ChemSpider
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ECHA InfoCard
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100.037.244
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EC Number
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InChI=1S/6FH.2K.Zr/h6*1H;;;/q;;;;;;2*+1;+4/p-6 Key: BJZIJOLEWHWTJO-UHFFFAOYSA-H
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F[Zr-2](F)(F)(F)(F)F.[K+].[K+]
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Properties
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F6K2Zr
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Molar mass
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283.411 g·mol−1
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Appearance
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white crystalline powder
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Density
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3.48 g/cm3
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soluble
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Hazards
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GHS labelling:
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Danger
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H301, H315, H319, H335
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P301, P302, P305, P310, P330, P351, P352
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
Potassium hexafluorozirconate is an inorganic compound of potassium, fluorine, and zirconium with the chemical formula K2ZrF6.[1][2]
Preparation
Potassium hexafluorozirconate can be prepared from precipitation from solutions:
- 2KF + ZrF4 → K2ZrF6↓
- 2KCl + (NH4)2ZrF6 → K2ZrF6↓ + 2NH4Cl
Also, in industry, it is obtained by sintering zirconium ore concentrates with K2SiF6 at 600–700 °C.[3]
Physical properties
Potassium hexafluorozirconate forms an odorless white crystalline powder.
It crystallizes in the monoclinic space group C 2/c (space group No. 15).[4]
Uses
Potassium hexafluorozirconate is used as an intermediate product in the electrolytic production of metallic zirconium.
It is also used as a flame retardant for wool,[5] grain refining agent in magnesium and aluminum alloys, welding flux, and optical glass component.[6]
References
- ^ "Potassium Hexafluorozirconate". American Elements. Retrieved 26 February 2024.
- ^ "Potassium hexafluorozirconate". Sigma Aldrich. Retrieved 26 February 2024.
- ^ Lewis, Alison; Olsen, Christine (2007). BIWIC 2007: 14th International Workshop on Industrial Crystallization : September 9th-11th, 2007, University of Cape Town, Cape Town, South Africa. IOS Press. p. 186. ISBN 978-1-58603-790-1. Retrieved 26 February 2024.
- ^ Hoppe, R.; Mehlhorn, B. (September 1976). "Die Kristallstruktur von K 2 ZrF 6". Zeitschrift für anorganische und allgemeine Chemie. 425 (3): 200–208. doi:10.1002/zaac.19764250303. Retrieved 26 February 2024.
- ^ Lewis, David M.; Rippon, John A. (20 May 2013). The Coloration of Wool and Other Keratin Fibres. John Wiley & Sons. p. 115. ISBN 978-1-118-62509-5. Retrieved 26 February 2024.
- ^ "Potassium hexafluorozirconate | CAS 16923-95-8 | Connect Chemicals". connectchemicals.com. Retrieved 26 February 2024.
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Zr(II) | |
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Zr(III) | |
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Zr(IV) | Acids and complexes | |
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Organozirconium(IV) | |
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H, (pseudo)halogens | |
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chalcogens | |
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pnictogens | |
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B, C group | |
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transition metals | |
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organic | |
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PF6−, AsF6−, SbF6− compounds | |
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AlF6− compounds | |
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chlorides, bromides, iodides and pseudohalogenides | |
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SiF62-, GeF62- compounds | |
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Oxyfluorides | |
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Organofluorides | |
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with transition metal, lanthanide, actinide, ammonium | |
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nitric acids | |
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bifluorides | |
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thionyl, phosphoryl, and iodosyl | |
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