Potassium hexafluorozirconate

{{Chembox

| Name = Potassium hexafluorozirconate

| ImageFile1 = Kaliumhexafluorozirconat.png

| ImageSize1 = 200px

| ImageFile2 =

| ImageSize2 = 200px

| IUPACName =

| PIN =

| OtherNames = dipotassium hexafluorozirconate, potassium zirconium hexafluoride, potassium fluorozirconate

|Section1={{Chembox Identifiers

| CASNo = 16923-95-8

| CASNo_Ref = {{cascite|correct|CAS}}

| ChemSpiderID = 11221760

| ChEBI =

| DTXSID = DTXSID00893979

| EINECS = 240-985-6

| Gmelin =

| PubChem = 56828182

| SMILES = F[Zr-2](F)(F)(F)(F)F.[K+].[K+]

| StdInChI= 1S/6FH.2K.Zr/h6*1H;;;/q;;;;;;2*+1;+4/p-6

| StdInChIKey = BJZIJOLEWHWTJO-UHFFFAOYSA-H

}}

|Section2={{Chembox Properties

| K=2 | Zr=1 | F=6

| Appearance = white crystalline powder

| Density = 3.48 g/cm3

| MeltingPtC =

| BoilingPtC =

| Solubility = soluble

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|Section3={{Chembox Hazards

| MainHazards =

| GHS_ref =

| GHSPictograms = {{GHS06}}

| GHSSignalWord = Danger

| HPhrases = {{HPhrases|301|315|319|335}}

| PPhrases = {{PPhrases|301|310|330|302|352|305|351}}

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|Section6={{Chembox Related

| OtherCompounds =

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Potassium hexafluorozirconate is an inorganic compound of potassium, fluorine, and zirconium with the chemical formula {{chem2|K2ZrF6}}.{{cite web |title=Potassium Hexafluorozirconate |url=https://www.americanelements.com/potassium-hexafluorozirconate-16923-95-8 |website=American Elements |access-date=26 February 2024 |language=en}}{{cite web |title=Potassium hexafluorozirconate |url=https://www.sigmaaldrich.com/RU/en/product/aldrich/336688 |publisher=Sigma Aldrich |access-date=26 February 2024}}

Preparation

Potassium hexafluorozirconate can be prepared from precipitation from solutions:

:{{chem2|2KF + ZrF4 -> K2ZrF6↓}}

:{{chem2|2KCl + (NH4)2ZrF6 -> K2ZrF6↓ + 2NH4Cl}}

Also, in industry, it is obtained by sintering zirconium ore concentrates with {{chem2|K2SiF6}} at 600–700 °C.{{cite book |last1=Lewis |first1=Alison |last2=Olsen |first2=Christine |title=BIWIC 2007: 14th International Workshop on Industrial Crystallization : September 9th-11th, 2007, University of Cape Town, Cape Town, South Africa |date=2007 |publisher=IOS Press |isbn=978-1-58603-790-1 |page=186 |url=https://books.google.com/books?id=soDe0QLEefsC&dq=Potassium+hexafluorozirconate&pg=PA186 |access-date=26 February 2024 |language=en}}

Physical properties

Potassium hexafluorozirconate forms an odorless white crystalline powder.

It crystallizes in the monoclinic space group C 2/c (space group No. 15).{{cite journal |last1=Hoppe |first1=R. |last2=Mehlhorn |first2=B. |title=Die Kristallstruktur von K 2 ZrF 6 |journal=Zeitschrift für anorganische und allgemeine Chemie |date=September 1976 |volume=425 |issue=3 |pages=200–208 |doi=10.1002/zaac.19764250303 |url=https://onlinelibrary.wiley.com/doi/10.1002/zaac.19764250303 |access-date=26 February 2024|url-access=subscription }}

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,{{cite book |last1=Lewis |first1=David M. |last2=Rippon |first2=John A. |title=The Coloration of Wool and Other Keratin Fibres |date=20 May 2013 |publisher=John Wiley & Sons |isbn=978-1-118-62509-5 |page=115 |url=https://books.google.com/books?id=-CxOUlZmFQcC&dq=Potassium+hexafluorozirconate&pg=PA115 |access-date=26 February 2024 |language=en}} grain refining agent in magnesium and aluminum alloys, welding flux, and optical glass component.{{cite web |title=Potassium hexafluorozirconate {{!}} CAS 16923-95-8 {{!}} Connect Chemicals |url=https://connectchemicals.com/en/product-finder/potassium-hexafluorozirconate |publisher=connectchemicals.com |access-date=26 February 2024}}

References

{{Reflist}}

{{Zirconium compounds}}

{{Potassium compounds}}

{{Fluorine compounds}}

Category:Zirconium compounds

Category:Potassium compounds

Category:Fluorine compounds

Category:Fluorometallates