Potassium hexafluorozirconate
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Other names
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3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.037.244 |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| F6K2Zr | |
| Molar mass | 283.411 g·mol−1 |
| Appearance | white crystalline powder |
| Density | 3.48 g/cm3 |
| soluble | |
| Structure[1] | |
| monoclinic | |
| C2/c (No. 15) | |
a = 6.57 Å, b = 11.44 Å, c = 6.94 Å α = 90°, β = 90.3°, γ = 90°
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Formula units (Z)
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4 units per cell |
| Hazards | |
| GHS labelling: | |
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| H301, H315, H319, H335 | |
| P301, P302, P305, P310, P330, P351, P352 | |
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Other cations
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Related compounds
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Hexafluorozirconic acid |
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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Potassium hexafluorozirconate is an inorganic compound of potassium, fluorine, and zirconium with the chemical formula K2ZrF6.[2][3] It is the potassium salt of hexafluorozirconic acid, forming white monoclinic crystals.
Preparation
Potassium hexafluorozirconate can be prepared by precipitation from solution. For example, by mixing potassium fluoride with zirconium tetrafluoride:
- 2KF + ZrF4 → K2ZrF6↓
Similarly, potassium chloride and ammonium hexafluorozirconate may be used:
- 2KCl + (NH4)2ZrF6 → K2ZrF6↓ + 2NH4Cl
Also, in industry, it is obtained by sintering zirconium ore concentrates with potassium fluorosilicate at 600–700 °C.[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
- ^ 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.
- ^ "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.
- ^ 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.