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{{Short description|Tetragonal polymorph of silica, mineral}}
{{Infobox mineral
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'''Keatite''' is a [[silicate mineral]] with the chemical formula [[silicon|Si]][[oxygen|O]]<sub>2</sub> ([[silicon dioxide]]) that was discovered in nature in 2013. It is a [[tetragonal]] [[Polymorphism (materials science)|polymorph]] of [[silica]] first known as a synthetic phase.<ref name=Mindat>[http://www.mindat.org/min-2173.html Ralph, Jolyon, and Ida Ralph. "Keatite: Keatite Mineral Information and Data." MinDat. 2013. Aug. 2013]</ref> It was reported as minute inclusions within [[clinopyroxene]] ([[diopside]]) crystals in an ultra high pressure [[garnet]] [[pyroxenite]] body. The host rock is part of the Kokchetav Massif in [[Kazakhstan]].<ref>[http://www.minsocam.org/msa/ammin/toc/Abstracts/2013_Abstracts/Jan13_Abstracts/Hill_p187_13.pdf Abstract Hill, Tina R., Hiromi Konishi, and Huifang Xu, ''Natural occurrence of keatite precipitates in UHP clinopyroxene from the Kokchetav Massif: A TEM investigation,'' American Mineralogist, Volume 98, pages 187–196, 2013 ]</ref>
'''Keatite''' is a [[silicate mineral]] with the chemical formula [[silicon|Si]][[oxygen|O]]<sub>2</sub> ([[silicon dioxide]]) that was discovered in nature in 2013. It is a [[tetragonal]] [[Polymorphism (materials science)|polymorph]] of [[silica]] first known as a synthetic phase.<ref name=Mindat>[http://www.mindat.org/min-2173.html Ralph, Jolyon, and Ida Ralph. "Keatite: Keatite Mineral Information and Data." MinDat. 2013. Aug. 2013]</ref> It was reported as minute inclusions within [[clinopyroxene]] ([[diopside]]) crystals in an ultra high pressure [[garnet]] [[pyroxenite]] body. The host rock is part of the [[Kokchetav Massif]] in [[Kazakhstan]].<ref>[http://www.minsocam.org/msa/ammin/toc/Abstracts/2013_Abstracts/Jan13_Abstracts/Hill_p187_13.pdf Abstract Hill, Tina R., Hiromi Konishi, and Huifang Xu, ''Natural occurrence of keatite precipitates in UHP clinopyroxene from the Kokchetav Massif: A TEM investigation,'' American Mineralogist, Volume 98, pages 187–196, 2013 ]</ref>


Keatite was synthesized in 1954 and named for Paul P. Keat who discovered it while studying the role of [[Sodium oxide|soda]] in the crystallization of [[amorphous silica]].<ref>[http://science.sciencemag.org/content/120/3113/328 Science 120 (27 Aug1954) pp 328-330 with the title "A new crystalline silica.]</ref> Keatite was well known before 1970 as evidenced in few studies from that era.<ref>http://scripts.iucr.org/cgi-bin/paper?a08203</ref><ref>http://eurjmin.geoscienceworld.org/content/7/6/1389</ref>
Keatite was synthesized in 1954 and named for Paul P. Keat who discovered it while studying the role of [[Sodium oxide|soda]] in the crystallization of [[amorphous silica]].<ref>[https://www.science.org/doi/10.1126/science.120.3113.328 Science 120 (27 Aug1954) pp 328-330 with the title "A new crystalline silica.]</ref> Keatite was well known before 1970 as evidenced in few studies from that era.<ref>{{Cite journal|url=http://scripts.iucr.org/cgi-bin/paper?a08203|doi = 10.1107/S0567740871003649|title = Transformation mechanism between high-quartz and keatite phases of LiAlSi2O6 composition|year = 1971|last1 = Li|first1 = C. T.|journal = Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry|volume = 27|issue = 6|pages = 1132–1140}}</ref><ref>{{Cite journal|url=http://eurjmin.geoscienceworld.org/content/7/6/1389|title=Keatite; II, Hydrothermal synthesis from silica-glass|journal=European Journal of Mineralogy|date=December 1995|volume=7|issue=6|pages=1389–1397|last1=Martin|first1=Brigitte|doi=10.1127/ejm/7/6/1389|bibcode=1995EJMin...7.1389M}}</ref>


==References==
==References==
{{Reflist}}
{{Reflist}}



{{Silica minerals}}
{{Silica minerals}}


[[Category:Silica polymorphs]]
[[Category:Silica polymorphs]]


{{silicate-mineral-stub}}
{{silicate-mineral-stub}}
{{materials-sci-stub}}

Latest revision as of 20:54, 24 January 2024

Keatite
Crystal structure
Allgemein
KategorieSilicate mineral
Formula
(repeating unit)		SiO2
Strunz classification4.DA.45
Crystal systemTetragonal
Identification
Crystal habitMicroscopic inclusions

Keatite is a silicate mineral with the chemical formula SiO2 (silicon dioxide) that was discovered in nature in 2013. It is a tetragonal polymorph of silica first known as a synthetic phase.[1] It was reported as minute inclusions within clinopyroxene (diopside) crystals in an ultra high pressure garnet pyroxenite body. The host rock is part of the Kokchetav Massif in Kazakhstan.[2]

Keatite was synthesized in 1954 and named for Paul P. Keat who discovered it while studying the role of soda in the crystallization of amorphous silica.[3] Keatite was well known before 1970 as evidenced in few studies from that era.[4][5]

References

[edit]
  1. ^ Ralph, Jolyon, and Ida Ralph. "Keatite: Keatite Mineral Information and Data." MinDat. 2013. Aug. 2013
  2. ^ Abstract Hill, Tina R., Hiromi Konishi, and Huifang Xu, Natural occurrence of keatite precipitates in UHP clinopyroxene from the Kokchetav Massif: A TEM investigation, American Mineralogist, Volume 98, pages 187–196, 2013
  3. ^ Science 120 (27 Aug1954) pp 328-330 with the title "A new crystalline silica.
  4. ^ Li, C. T. (1971). "Transformation mechanism between high-quartz and keatite phases of LiAlSi2O6 composition". Acta Crystallographica Section B: Structural Crystallography and Crystal Chemistry. 27 (6): 1132–1140. doi:10.1107/S0567740871003649.
  5. ^ Martin, Brigitte (December 1995). "Keatite; II, Hydrothermal synthesis from silica-glass". European Journal of Mineralogy. 7 (6): 1389–1397. Bibcode:1995EJMin...7.1389M. doi:10.1127/ejm/7/6/1389.


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