Potassium hexafluorozirconate is an inorganic compound of potassium, fluorine, and zirconium with the chemical formula K2ZrF6.[1][2][3]

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.[4]

Physical properties

Potassium hexafluorozirconate forms an odorless white crystalline powder.

It crystallizes in the monoclinic space group C 2/c (space group No. 15).[5]

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,[6] grain refining agent in magnesium and aluminum alloys, welding flux, and optical glass component.[7]

References

  1. ^ "Potassium Hexafluorozirconate". American Elements. Retrieved 26 February 2024.
  2. ^ "Potassium hexafluorozirconate". Sigma Aldrich. Retrieved 26 February 2024.
  3. ^ "Potassium Hexafluorozirconate Powder (CAS 16923-95-8)". Stanford Advanced Materials. 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. ^ 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.
  6. ^ 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.
  7. ^ "Potassium hexafluorozirconate | CAS 16923-95-8 | Connect Chemicals". connectchemicals.com. Retrieved 26 February 2024.