Chemistry:Potassium hexafluorozirconate
| |
| Names | |
|---|---|
Other names
| |
| Identifiers | |
3D model (JSmol)
|
|
| ChemSpider | |
| EC Number |
|
PubChem CID
|
|
CompTox Dashboard (EPA)
|
|
| |
| |
| 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°
| |
Formula units (Z)
|
4 units per cell |
| Hazards | |
| GHS pictograms | 
|
| GHS Signal word | Danger |
| H301, H315, H319, H335 | |
| P301, P310, P330, P302, P352, P305, P351 | |
| Related compounds | |
Other cations
|
|
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 | |
Potassium hexafluorozirconate is an inorganic compound of potassium, fluorine, and zirconium with the chemical formula K
2ZrF
6.[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 + ZrF
4 → K
2ZrF
6↓
Similarly, potassium chloride and ammonium hexafluorozirconate may be used:
- 2KCl + (NH
4)
2ZrF
6 → K
2ZrF
6↓ + 2NH
4Cl
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. https://onlinelibrary.wiley.com/doi/10.1002/zaac.19764250303. Retrieved 26 February 2024.
- ↑ "Potassium Hexafluorozirconate" (in en). https://www.americanelements.com/potassium-hexafluorozirconate-16923-95-8.
- ↑ "Potassium hexafluorozirconate". Sigma Aldrich. https://www.sigmaaldrich.com/RU/en/product/aldrich/336688.
- ↑ Lewis, Alison; Olsen, Christine (2007) (in en). 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. https://books.google.com/books?id=soDe0QLEefsC&dq=Potassium+hexafluorozirconate&pg=PA186. Retrieved 26 February 2024.
- ↑ Lewis, David M.; Rippon, John A. (20 May 2013) (in en). The Coloration of Wool and Other Keratin Fibres. John Wiley & Sons. p. 115. ISBN 978-1-118-62509-5. https://books.google.com/books?id=-CxOUlZmFQcC&dq=Potassium+hexafluorozirconate&pg=PA115. Retrieved 26 February 2024.
- ↑ "Potassium hexafluorozirconate | CAS 16923-95-8 | Connect Chemicals". connectchemicals.com. https://connectchemicals.com/en/product-finder/potassium-hexafluorozirconate.
 |  |
