Potassium hexafluorozirconate

Potassium hexafluorozirconate
Names
Other names
dipotassium hexafluorozirconate, potassium zirconium hexafluoride, potassium fluorozirconate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.037.244 Edit this at Wikidata
EC Number
  • 240-985-6
  • InChI=1S/6FH.2K.Zr/h6*1H;;;/q;;;;;;2*+1;+4/p-6
    Key: BJZIJOLEWHWTJO-UHFFFAOYSA-H
  • F[Zr-2](F)(F)(F)(F)F.[K+].[K+]
Properties
F6K2Zr
Molar mass 283.411 g·mol−1
Appearance white crystalline powder
Density 3.48 g/cm3
soluble
Hazards
GHS labelling:
GHS06: Toxic
Danger
H301, H315, H319, H335
P301, P302, P305, P310, P330, P351, P352
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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

  1. ^ "Potassium Hexafluorozirconate". American Elements. Retrieved 26 February 2024.
  2. ^ "Potassium hexafluorozirconate". Sigma Aldrich. Retrieved 26 February 2024.
  3. ^ 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.
  4. ^ 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.
  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.

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