Potassium hexafluorozirconate is an inorganic compound of potassium, fluorine, and zirconium with the chemical formula K2ZrF6.[1][2]
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Names | |
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Other names dipotassium hexafluorozirconate, potassium zirconium hexafluoride, potassium fluorozirconate | |
Identifiers | |
3D model (JSmol) | |
ChemSpider | |
ECHA InfoCard | 100.037.244 |
EC Number |
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PubChem CID | |
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 | |
Hazards | |
GHS labelling: | |
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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). |
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
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