(Translated by https://www.hiragana.jp/)
Potassium fluorosilicate: Difference between revisions - Wikipedia Jump to content

Potassium fluorosilicate: Difference between revisions

From Wikipedia, the free encyclopedia
Browse history interactively
← Previous edit
Content deleted Content added
VisualWikitext
No edit summary
Citation bot (talk | contribs)
Bots
5,014,728 edits
Add: bibcode. | Use this bot. Report bugs. | Suggested by Graeme Bartlett | #UCB_toolbar
 
(13 intermediate revisions by 10 users not shown)
Line 24: Line 24:
}}
}}
|Section2={{Chembox Properties
|Section2={{Chembox Properties
| Formula= K<sub>2</sub>[SiF<sub>6</sub>]
| Formula= {{chem2|K2[SiF6]}}
| MolarMass = 220.28 gmol<sup>-1</sup> <ref name="alfa"/>
| MolarMass = 220.28 gmol<sup>−1</sup> <ref name="alfa"/>
| Appearance =
| Appearance =
| Odor =
| Odor =
| Density = 2.27gcm<sup>-3</sup> <ref name="alfa"/> , 2.719gcm<sup>-3</sup> <ref name=loehlin/>
| Density = 2.27gcm<sup>−3</sup>,<ref name="alfa"/> 2.719gcm<sup>−3</sup> <ref name=loehlin/>
| Solubility = Slighly soluble in water
| Solubility = Slightly soluble in water
| SolubleOther =
| SolubleOther =
| RefractIndex =
| RefractIndex =
Line 55: Line 55:
[[Fluorosilicic acid]]}}
[[Fluorosilicic acid]]}}
}}
}}
'''Potassium fluorosilicate''' is a chemical compound with the chemical formula K<sub>2</sub>[SiF<sub>6</sub>].
'''Potassium fluorosilicate''' is a chemical compound with the chemical formula {{chem2|K2[SiF6]}}.


When doped with Potassium hexfluoromangante(IV) (K<sub>2</sub>[MnF<sub>6</sub>]) it forms a narrow band red producing [[phosphor]], (often abbreviated PSF or KSF), of economic interest due to its applicability in LED lighting and displays.
When doped with Potassium hexafluoromanganate(IV) ({{chem2|(K2[MnF6]}}) it forms a narrow band red producing [[phosphor]], (often abbreviated PSF or KSF), of economic interest due to its applicability in LED lighting and displays.


==Natural occurrence==
==Natural occurrence==
Occurs naturally as [[Hiereatite]], found in the [[Aeolian islands]] (Sicily/Italy).<ref>{{citation| url =https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Hieratit | title = Hieratit | work = www.mineralienatlas.de }}</ref> A hexagonal form [[Demartinite]] has also been found at the rim of volcanic fumaroles in the same islands.<Ref>{{citation|journal = The Canadian Mineralogist | volume = 45 | pages = 1275-1280 | year = 2007 | doi = 10.2113/gscanmin.45.5.1275 | title = DEMARTINITE, A NEW POLYMORPH OF K2SiF6 FROM LA FOSSA CRATER, VULCANO, AEOLIAN ISLANDS, ITALY | first = CARLO MARIA | last = GRAMACCIOLIß | first2 = ITALO | last2 = CAMPOSTRINI |}}</ref>
Occurs naturally as [[Hiereatite]], found in the [[Aeolian islands]] (Sicily/Italy).<ref>{{citation| url =https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Hieratit | title = Hieratit | work = www.mineralienatlas.de }}</ref> A hexagonal form [[Demartinite]] has also been found at the rim of volcanic fumaroles in the same islands.<ref>{{citation|journal = The Canadian Mineralogist | volume = 45 | pages = 1275–1280 | year = 2007 | doi = 10.2113/gscanmin.45.5.1275 | title = DEMARTINITE, A NEW POLYMORPH OF K2SiF6 FROM LA FOSSA CRATER, VULCANO, AEOLIAN ISLANDS, ITALY | first1 = CARLO MARIA | last1 = GRAMACCIOLIß | first2 = ITALO | last2 = CAMPOSTRINI | issue = 5 | bibcode = 2007CaMin..45.1275G }}</ref>


==Structure and properties==
==Structure and properties==
According to analysis by (Loehlin, 1984) it has space group Fm{{overbar|3}}m, with a<sub>0</sub> = 0.8134 nm, V = 0.538.2 nm<sup>3</sup> at 295K. The Si-F bond length is 0.1683nm.<ref name=loehlin/> At high temperatures and pressures -beta and -gamma phases exist.<ref name=phosphor2018/>
According to analysis by (Loehlin, 1984) it has space group Fm{{overbar|3}}m, with a<sub>0</sub> = 0.8134&nbsp;nm, V = 0.538.2&nbsp;nm<sup>3</sup> at 295K. The Si-F bond length is 0.1683&nbsp;nm.<ref name=loehlin/> At high temperatures and pressures -beta and -gamma phases exist.<ref name=phosphor2018/>


== Application ==
== Application ==
Potassium fluorosilicate has applications including : porcelain manufacture; preservation of timber; aluminium and magnesium production (smelting); intermediate in the manufacture of optical glass.<ref name="alfa"/>
Potassium fluorosilicate has applications in porcelain manufacture, the preservation of timber, aluminium and magnesium smelting, and the manufacture of optical glass.<ref name="alfa"/>


===Red phosphor===
===Red phosphor===
When doped with potassium hexfluoromangante(IV) (K<sub>2</sub>[MnF<sub>6</sub>]), a narrow band red phosphor is produced, emitting at around 630&nbsp;nm. This substance has application improving the white light quality of [[white LED]]s that use a blue emitting LED in combination with the yellow [[cerium]] doped [[yttrium aluminium garnet]] phoshor (YAG), Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub>:Ce<sup>3+</sup>.<ref name=phosphor2017/>
When doped with potassium hexafluoromanganate(IV) {{chem2|(K2[MnF6]}}), a narrow band red phosphor is produced, emitting at around 630&nbsp;nm. This substance has application improving the white light quality of [[white LED]]s that use a blue emitting LED in combination with the yellow [[cerium]] doped [[yttrium aluminium garnet]] phosphor (YAG), {{chem2|Y3Al5O12:Ce(3+)}}.<ref name=phosphor2017/>


Synthesis routes to the phoshpor include co-crystallisation and co-precipitation. For example K<sub>2</sub>[MnF<sub>6</sub> in (40%) [[hydrofluoric acid]] with [[potassium fluoride]] can be mixed with SiO<sub>2</sub> dissolved in (40%) hydrofluoric acid to co-precipitate the phosphor.<ref name=phosphor2018/>
Synthesis routes to the phosphor include co-crystallisation and co-precipitation. For example, {{chem2|K2[MnF6]}} in (40%) [[hydrofluoric acid]] with [[potassium fluoride]] can be mixed with {{chem2|SiO2}} dissolved in (40%) hydrofluoric acid to co-precipitate the phosphor.<ref name=phosphor2018/>


The acronyms KSF or PSF are used for Potassium fluorosilicate phoshpors.<ref{{citation|url = https://www.eenewseurope.com/news/differentiate-or-loose-yoles-analysis-led-phosphors-and-qds/page/0/1 | title= Differentiate or loose! Yole's analysis on LED phosphors and QDs | date = 20 Nov 2017 | first = Julien | last = Happich | work = www.eenewseurope.com}}</ref>
The acronyms KSF or PSF are used for potassium fluorosilicate phosphors.<ref>{{citation|url = https://www.eenewseurope.com/news/differentiate-or-loose-yoles-analysis-led-phosphors-and-qds/page/0/1 | title= Differentiate or loose! Yole's analysis on LED phosphors and QDs | date = 20 Nov 2017 | first = Julien | last = Happich | work = www.eenewseurope.com}}</ref>


==See also==
==See also==
Line 86: Line 86:
<ref name="alfa">{{citation|url = https://www.alfa.com/en/catalog/044495/ | title = 44495 Potassium hexafluorosilicate, 99.999% (metals basis) | work = www.alfa.com }}</ref>
<ref name="alfa">{{citation|url = https://www.alfa.com/en/catalog/044495/ | title = 44495 Potassium hexafluorosilicate, 99.999% (metals basis) | work = www.alfa.com }}</ref>


<ref name=loehlin>{{citation| journal = Acta Cryst. | year = 1984 | volume = C40| pages = 570 | doi = 10.1107/S0108270184004893| title = Redetermination of the structure of potassium hexafluorosilicate, K2SiF6 | first = J. H.| last = Loehlin }}</ref>
<ref name=loehlin>{{citation| journal = Acta Crystallogr. | year = 1984 | volume = C40| pages = 570 | doi = 10.1107/S0108270184004893| title = Redetermination of the structure of potassium hexafluorosilicate, K2SiF6 | first = J. H.| last = Loehlin | issue = 3 | bibcode = 1984AcCrC..40..570L }}</ref>


<ref name=phosphor2017>{{citation|url = | doi = 10.1364/OME.7.003332 | volume = 7 | number =9 | date = 1 Sep 2017 | journal = OPTICAL MATERIALS EXPRESS 3332 | title = K2SiF6:Mn4+ as a red phosphor for displays and warm-white LEDs: a review of properties and perspectives | first = HELEEN F. | last = SIJBOM | first2= REINERT | last2 = VERSTRAETE | first3 = JONAS J. | last3 = JOOS | first4 = DIRK | last4 = POELMAN | first5 = PHILIPPE F. | last5 = SMET }}</ref>
<ref name=phosphor2017>{{citation| doi = 10.1364/OME.7.003332 | volume = 7 | number =9 | date = 1 Sep 2017 | title = K2SiF6:Mn4+ as a red phosphor for displays and warm-white LEDs: a review of properties and perspectives | first1 = HELEEN F. | last1 = SIJBOM | first2= REINERT | last2 = VERSTRAETE | first3 = JONAS J. | last3 = JOOS | first4 = DIRK | last4 = POELMAN | first5 = PHILIPPE F. | last5 = SMET | journal = Optical Materials Express | page = 3332 | bibcode = 2017OMExp...7.3332S | doi-access = free }}</ref>

⚫
<ref name=phosphor2018>{{citation | title =Red Mn4+-Doped Fluoride Phosphors: Why Purity Matters | url = https://core.ac.uk/download/pdf/158345417.pdf | first = Reinert | last = Verstraete | first2 =Heleen F. | last2 = Sijbom | first3 = Jonas J.| last3 = Joos | first4 =Katleen | last4 = Korthout | first5 =Dirk | last5 = Poelman | first6 = Christophe | last6 = Detavernier | first7 = Philippe F. | last7 = Smet | journal = ACS Applied Materials & Interfaces | year = 2018 |volume = 10 |number = 22 | pages = 18845-18856 | doi = 10.1021/acsami.8b01269 }}</ref>


⚫
<ref name=phosphor2018>{{citation | title =Red Mn4+-Doped Fluoride Phosphors: Why Purity Matters | url = https://core.ac.uk/download/pdf/158345417.pdf | first1 = Reinert | last1 = Verstraete | first2 =Heleen F. | last2 = Sijbom | first3 = Jonas J.| last3 = Joos | first4 =Katleen | last4 = Korthout | first5 =Dirk | last5 = Poelman | first6 = Christophe | last6 = Detavernier | first7 = Philippe F. | last7 = Smet | journal = ACS Applied Materials & Interfaces | year = 2018 |volume = 10 |number = 22 | pages = 18845–18856 | doi = 10.1021/acsami.8b01269 | pmid = 29750494 | doi-access = free }}</ref>


}}
}}

Latest revision as of 10:50, 21 November 2023

Potassium fluorosilicate
Names
Preferred IUPAC name
Potassium fluorosilicate
Other names
Potassium hexafluorosilicate(IV)
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.037.163 Edit this at Wikidata
EC Number
RTECS number
  • VV8400000
UNII
UN number 2655
  • InChI=1S/F6Si.2K/c1-7(2,3,4,5)6;;/q-2;2*+1
    Key: UUHPPUWEDCVPCO-UHFFFAOYSA-N
  • F[Si-2](F)(F)(F)(F)F.[K+].[K+]
Properties
K2[SiF6]
Molar mass 220.28 gmol−1 [1]
Density 2.27gcm−3,[1] 2.719gcm−3 [2]
Slightly soluble in water
Structure
cubic
Fm3m
a = 0.8134 nm
0.538.2 nm3
4
Hazards
GHS labelling:
GHS06: Toxic
Danger
H301, H311, H331
P261, P264, P270, P271, P280, P301+P310, P302+P352, P304+P340, P311, P312, P321, P322, P330, P361, P363, P403+P233, P405, P501
Related compounds
Other cations
 Ammonium hexafluorosilicate
Sodium fluorosilicate

Fluorosilicic acid

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Potassium fluorosilicate is a chemical compound with the chemical formula K2[SiF6].

When doped with Potassium hexafluoromanganate(IV) ((K2[MnF6]) it forms a narrow band red producing phosphor, (often abbreviated PSF or KSF), of economic interest due to its applicability in LED lighting and displays.

Natural occurrence[edit]

Occurs naturally as Hiereatite, found in the Aeolian islands (Sicily/Italy).[3] A hexagonal form Demartinite has also been found at the rim of volcanic fumaroles in the same islands.[4]

Structure and properties[edit]

According to analysis by (Loehlin, 1984) it has space group Fm3m, with a0 = 0.8134 nm, V = 0.538.2 nm3 at 295K. The Si-F bond length is 0.1683 nm.[2] At high temperatures and pressures -beta and -gamma phases exist.[5]

Application[edit]

Potassium fluorosilicate has applications in porcelain manufacture, the preservation of timber, aluminium and magnesium smelting, and the manufacture of optical glass.[1]

Red phosphor[edit]

When doped with potassium hexafluoromanganate(IV) (K2[MnF6]), a narrow band red phosphor is produced, emitting at around 630 nm. This substance has application improving the white light quality of white LEDs that use a blue emitting LED in combination with the yellow cerium doped yttrium aluminium garnet phosphor (YAG), Y3Al5O12:Ce3+.[6]

Synthesis routes to the phosphor include co-crystallisation and co-precipitation. For example, K2[MnF6] in (40%) hydrofluoric acid with potassium fluoride can be mixed with SiO2 dissolved in (40%) hydrofluoric acid to co-precipitate the phosphor.[5]

The acronyms KSF or PSF are used for potassium fluorosilicate phosphors.[7]

See also[edit]

References[edit]

  1. ^ a b c d "44495 Potassium hexafluorosilicate, 99.999% (metals basis)", www.alfa.com
  2. ^ a b Loehlin, J. H. (1984), "Redetermination of the structure of potassium hexafluorosilicate, K2SiF6", Acta Crystallogr., C40 (3): 570, Bibcode:1984AcCrC..40..570L, doi:10.1107/S0108270184004893
  3. ^ "Hieratit", www.mineralienatlas.de
  4. ^ GRAMACCIOLIß, CARLO MARIA; CAMPOSTRINI, ITALO (2007), "DEMARTINITE, A NEW POLYMORPH OF K2SiF6 FROM LA FOSSA CRATER, VULCANO, AEOLIAN ISLANDS, ITALY", The Canadian Mineralogist, 45 (5): 1275–1280, Bibcode:2007CaMin..45.1275G, doi:10.2113/gscanmin.45.5.1275
  5. ^ a b Verstraete, Reinert; Sijbom, Heleen F.; Joos, Jonas J.; Korthout, Katleen; Poelman, Dirk; Detavernier, Christophe; Smet, Philippe F. (2018), "Red Mn4+-Doped Fluoride Phosphors: Why Purity Matters" (PDF), ACS Applied Materials & Interfaces, 10 (22): 18845–18856, doi:10.1021/acsami.8b01269, PMID 29750494
  6. ^ SIJBOM, HELEEN F.; VERSTRAETE, REINERT; JOOS, JONAS J.; POELMAN, DIRK; SMET, PHILIPPE F. (1 Sep 2017), "K2SiF6:Mn4+ as a red phosphor for displays and warm-white LEDs: a review of properties and perspectives", Optical Materials Express, 7 (9): 3332, Bibcode:2017OMExp...7.3332S, doi:10.1364/OME.7.003332
  7. ^ Happich, Julien (20 Nov 2017), "Differentiate or loose! Yole's analysis on LED phosphors and QDs", www.eenewseurope.com
Retrieved from "https://en.wikipedia.org/w/index.php?title=Potassium_fluorosilicate&oldid=1186172776"