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

  1. ↑ 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.
  2. ↑ "Potassium Hexafluorozirconate". American Elements. Retrieved 26 February 2024.
  3. ↑ "Potassium hexafluorozirconate". Sigma Aldrich. Retrieved 26 February 2024.
  4. ↑ 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.
  5. ↑ 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.
  6. ↑ "Potassium hexafluorozirconate | CAS 16923-95-8 | Connect Chemicals". connectchemicals.com. Retrieved 26 February 2024.
source: https://en.wikipedia.org/wiki/Potassium_hexafluorozirconate