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Coesite

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Formula:
SiO
 
2
System:MonoclinicColour:Colourless
Lustre:VitreousHardness:7½ - 8
Name:For Loring Coes Jr. (1915-1978), American chemist who first synthesized it.
Polymorph of:Cristobalite, Quartz, Stishovite, Tridymite


A high-pressure modification of SiO2.

Classification of Coesite

IMA status:Approved
Strunz 8th edition ID:4/D.01-50
Nickel-Strunz 10th (pending) edition ID:4.DA.35

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
A : With small cations: Silica family
Dana 8th edition ID:75.1.4.1

75 : TECTOSILICATES Si Tetrahedral Frameworks
1 : Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Hey's CIM Ref.:7.8.2

7 : Oxides and Hydroxides
8 : Oxides of Si
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Type Occurrence of Coesite

Type Locality:Meteor Crater (Barringer Crater), Winslow, Coconino Co., Arizona, USA
Year of Discovery:1954

Occurrences of Coesite

Geological Setting:Formed at pressures > 20 kbar. Impact craters, kimberlites, eclogites.

Physical Properties of Coesite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Colourless
Hardness (Mohs):7½ - 8
Cleavage:Poor/Indistinct
Suspected on {010}{012}
Fracture:Sub-Conchoidal
Density (calculated):2.92 g/cm3

Crystallography of Coesite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b {B1 1 2/b} {C2/c} {C1 2/c 1}
Cell Parameters:a = 7.143(2) Å, b = 12.383(3) Å, c = 7.143(2) Å
β = 120°
Ratio:a:b:c = 0.577 : 1 : 0.577
Unit Cell Volume:V 547.16 ų (Calculated from Unit Cell)
Z:16
Morphology:Irregular to rectangular grains.

Optical Data of Coesite

Type:Biaxial (+)
RI values: nα = 1.593 - 1.599 nγ = 1.597 - 1.604
2V:Measured: 54° to 64°
Maximum Birefringence:δ = 0.004 - 0.005

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r < v weak
Comments:On synthetic material

Chemical Properties of Coesite

Formula:
SiO
 
2
Simplified for copy/paste:SiO2
Essential elements:O, Si
All elements listed in formula:O, Si
Common Impurities:Al,Fe,Na

Relationship of Coesite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.DA.05Quartz
SiO
 
2
4.DA.10Opal
SiO
 
2
· nH
 
2
O
4.DA.10Tridymite
SiO
 
2
4.DA.15Cristobalite
SiO
 
2
4.DA.20Mogánite
SiO
 
2
4.DA.25Melanophlogite
46SiO
 
2
· 6(N
 
2
,CO
 
2
) · 2(CH
 
4
,N
 
2
)
4.DA.30Lechatelierite
SiO
 
2
4.DA.40Stishovite
SiO
 
2
4.DA.45Keatite
SiO
 
2
4.DA.50Seifertite
SiO
 
2
Related Minerals - Hey's Index Grouping:

- +
7.8.1Quartz
SiO
 
2
7.8.3Tridymite
SiO
 
2
7.8.4Stishovite
SiO
 
2
7.8.5Cristobalite
SiO
 
2
7.8.6Lechatelierite
SiO
 
2
7.8.7Silhydrite
3SiO
 
2
· H
 
2
O
7.8.8Opal
SiO
 
2
· nH
 
2
O
7.8.9Mogánite
SiO
 
2

Other Names for Coesite

Other Languages:
German:Coesit
Russian:Коэсит
Simplified Chinese:柯石英
Spanish:Coesita
Traditional Chinese:柯石英

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Coesite

Reference List:

- +
Chao, E.C.T., et al (1960), First natural occurrence of coesite, Science: 132: 220-222.

American Mineralogist (1960): 45: 1313.

American Mineralogist (1962): 47: 1292-1302.

Fahey, J.J. (1964), Recovery of coesite and stishovite from Coconino Sandstone of Meteor Crater, AZ, American Mineralogist: 49: 1643-1647.

Bohn, E. & W. Stöber (1966), Coesit und Stishovit als isolierte natürliche Mineralien, Neues Jahrb. Min.: 89-96.

Zeitschrift für Kristallographie: 145: 108-123.

Bohlen, S.R. and Boettcher, A.L. (1982) The quartz-coesite transformation: a precise determination and the effects of other components. Journal of Geophysical Research: 87(B8): 7073-7078.

Zhang, J., Li, B., Utsumi, W., and Liebermann, R.C. (1996) In situ X-ray observations of the coesite-stishovite transition: reversed phase boundary and kinetics. Physics and Chemistry of Minerals: 23: 1-10.

Gibbs, G.V., M.B. Boisen, Jr., .M. Rosso, D.M. Teter, & M..T. Bukowinski (2000), Model structures and electron density distribution for the silica polymorph coesite at pressure: An assessment of OO bonded interactions: Journal of Physical Chemistry: B: 104: 10534-10542.

Mosenfelder, J.L. (2000) Pressure dependence of hydroxyl solubility in coesite. Physics and Chemistry of Minerals 27(9): 610-617.

Internet Links for Coesite

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  • Localities for Coesite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Algeria
     
    Shohei Kaneko, Eiji Ohtani, Masaaki Miyahara, Takeshi Sakai, Masahiro Kayama, Hirotsugu Nishido, Yasuo Oishi, Naohisa Hirao (2011) Dynamic event recorded in a lunar meteorite NWA 4734. Japan Geooscience Union Meeting Makuhari, Chiba Japan.
    Atlantic Ocean
     
    • Upper continental slope of New Jersey
    B.P. Glass, S. Liu & P.B. Leavens (2002) Amer. Mineral. 87, 562-565
    B.P. Glass, S. Liu & P.B. Leavens (2002) Amer. Mineral. 87, 562-565
    Brazil
     
    • Minas Gerais
    Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html
    Chris D. Parkinson et al. , " Ultrahigh-pressure pyrope-kyanite granulites and associated eclogites in Neoproterozoic nappes of southeast Brazil", 2001, Universidade do Estado do Rio de Janeiro, http://akmotoki.tripod.com/2001/Waseda/Cdp.html
    Canada
     
    • Northwest Territories
      • Lac de Gras
        • Diavik Mine
    Donnelly, C. L. et al. (2007): Lithos 98, 160-176.
    China
     
    • Anhui Province
      • Anqing Prefecture
        • Qianshan Co.
    Jixi Xiang, Lingen Xu, Fan Xiang, Qianhua Shi, Siben Wu, Xinyuan Zhang, and Yiyong Zhang (2008): Geology in China 35(6), 869-878
    American Mineralogist, Volume 87, pages 875-881, 2002, KAI YE et al. "Ultrahigh-pressure (UHP) low-Al titanites from carbonate-bearing rocks in Dabieshan-Sulu UHP terrane, eastern China".
        • Taihu Co.
    Yonghong Shi and Qingchen Wang (2004): Chinese Journal of Geology 39(3), 375-387
    Wu, Xiuling, Dawei Meng, and Yujing Han (2005), α-PbO2-type nanophase of TiO2 from coesite-bearing eclogite in the Dabie Mountains, China: American Mineralogist: 90: 1458-1461.
        • Yuexi Co.
    Yilin Xiao, Hoefs, J., van den Kerkhof, A.M., Fiebig, J., and Yongfei Zheng (2000): Contributions to Mineralogy and Petrology 139, 1-16.
    www.scienceinchina.com/ky/0008/ky0748.pdf.
          • Wumiao
    A.I. Okay et al. , Eur. J. Mineral. , 1989, 1, pp. 595-598.
            • Marble quarry
    Aral, I. (1993). Petrology of a diamond and coesite-bearing metamorphic terrain: Dabie Shan. China. Eur. J. Mineral, 5, 659-675.
    • Henan Province
      • Sanmenxia Prefecture
        • Lushi Co.
          • Guanpo
    Nenggao Hu, Donglin Zhao, Baiqing Xu, and Tao Wang (1995): Journal of Mineralogy and Petrology 16(4)
      • Xinyang Prefecture
        • Xin Co.
    Ruyuan Zhang and Liou, J.G. (1994): European Journal of Mineralogy 6(2), 217-233.
    • Hubei Province
      • Huanggang Prefecture
        • Hong'an Co.
    Yuanbao Wu, Shan Gao, Hongfei Zhang, Saihong Yang, Wenfang Jiao, Yongsheng Liu, and Honglin Yuan (2008): Contributions to Mineralogy and Petrology 155, 123-133.
        • Yingshan Co.
    Guxian Lü, Jing Chen, Tiping Ding, Xiaobo Li, Fangzheng Wang, and Ruixun Li (2001): Journal of Geosciences of China 3(1), 1-12.
    • Jiangsu Province
      • Lianyungang Prefecture
        • Donghai Co.
          • Maobei
    Yilin Xiao, Zheming Zhang, Hoefs, J., and van den Kerkhof, A. (2006): Contributions to Mineralogy and Petrology 152, 443-458.
    Zhang, R.Y., Liou, J.G., and Shu, J.F. (2002): American Mineralogist 87, 445-453; Yang, T.N. (2004): Journal of Metamorphic Geology 22(7), 653–669; Rong Yan and Jianjun Yang (2013): Acta Petrologica Sinica 29(5), 1621-1633
    • Liaoning Province (Manchuria; Dongbei Region)
      • Anshan Prefecture
        • Xiuyan Co.
          • Pianling
    Chen, M., Yin, F., Li, X., Xie, X., Xiao, W., & Tan, D. (2013). Natural occurrence of reidite in the Xiuyan crater of China. Meteoritics & Planetary Science.
    • Qinghai Province
      • Haixi Autonomous Prefecture
        • Dulan Co.
    Mattinson, C.G., Wooden, J.L., Liou, J.G., Bird, D.K., and Wu, C.L. (2006): American Journal of Science 306, 683-711.
    • Shandong Province
      • Jiaodong Peninsula (Jiaodong Gold Province)
        • Qingdao Prefecture
          • Jiaonan Co.
    Hongrui Fan, Jinghui Guo, Fangfang Hu, Xuelei Chu, and Chengwei Jin (2005): Acta Petrologica Sinica 21(4), 1125-1132.
        • Weihai Prefecture
          • Rongcheng Co.
    Science, Vol. 278, 24 Oct. 1997, pp. 701-707.
      • Linyi Prefecture
        • Yimeng Mtns (Yimeng Shan)
          • Mengyin Co.
            • Mengyin Kimberlite field
              • Changma Kimberlite belt
                • Wangcun deposit
    Wuyi Wang (1998): Earth and Planetary Science Letters 160(3/4), 831-843.
      • Rizhao Prefecture
        • Lanshan District
    http://dunite.mr.nsysu.edu.tw/m02%20Liou-modified.doc
    American Mineralogist, Volume 87, pages 875-881, 2002, KAI YE et al. "Ultrahigh-pressure (UHP) low-Al titanites from carbonate-bearing rocks in Dabieshan-Sulu UHP terrane, eastern China".
    • Tibet Autonomous Region
      • Shannan Prefecture (Lhokha Prefecture; Lhoka Prefecture)
        • Qusum Co. (Qusong Co.)
    Robinson, P.T., Jingsui Yang, Wenji Bai, and Qingsong Fang (2006): 3rd Annual Meeting of the Asia Oceania Geosciences Society (AOGS), July 10-14, 2006, Abstract 59-SE-A0857.
    • Xinjiang Autonomous Region
      • Bayin'gholin Autonomous Prefecture (Bayingolin Autonomous Prefecture; Bayinguoleng Autonomous Prefecture)
        • Ruoqiang Co. (Qakilik Co.; Chaqiliq Co.)
          • Yinggelisayi area
    Zhang Anda, Liu Liang, Sun Yong, Chen Danling, Wang Yan, and Luo Jinhai (2004): Chinese Science Bulletin 49(23), 2527-2532.
    Finland
     
    • Western and Inner Finland Region
    Lehtinen, Martti 1976. Lake lappajärvi, a meteorite impact site in western Finland. Geological Survey of Finland Bulletin 282.
    Germany
     
    • Bavaria
      • Swabia
        • Nördlingen
          • Ries Crater
    http://geosciences.smsu.edu/geology/FieldTrips/Ries/page2.html
    http://geosciences.smsu.edu/geology/FieldTrips/Ries/page5.html
            • Unterschneidheim
    Stähle, V., Altherr, R., Koch, M., and Nasdala, L. (2008): Contributions to Mineralogy and Petrology 155, 457-472.
            • Wemding
    Stähle, V., Altherr, R., Koch, M., and Nasdala, L. (2008): Contributions to Mineralogy and Petrology 155, 457-472.
    Italy
     
    • Aosta Valley
      • Valtournanche Valley
        • Valtournanche
    Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.; Compagnoni Roberto , Frezzotti Maria Luce, Selverstone Jane , Sharp Zachary (2011) 9th International Eclogite Conference 2011, Mariánské Lázně, Czech Republic
    • Piedmont
      • Cuneo Province
    [MinRec 27:303]
        • Po Valley
          • Martiniana Po
    Daniele Castelli
        • Varaita Valley
          • Brossasco
            • Gilba Valley
    Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007). Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
    T. Hirajima and R. Compagnoni : "Petrology of a jadeite-quartz-almandine-phengite fels with retrograde ferro-nyböite from the Dora-Maira Massif, Western Alps", Eur. Journ. Mineral., 1993, 5, pp 943-955.
    Kazakhstan
     
    • Akmola Province (Aqmola Oblysy; Akmolinskaya Oblast')
      • Kokshetau (Kökshetau; Kokchetau; Kokchetav)
    9th International Eclogite Conference 2011, Mariánské Lázně, Czech Republic
      • Prirechnoye
        • Lake Kumdikol (Lake Kumdykol'; Ozero Kumdykol')
    Nitsenko, P., and Ussoltsev, I.I. (2004): Earth Science Frontiers 11(2), 333-338
    Nigeria
     
    • Yobe State
      • Bogga Dingare
    Weisberg, M.K. & Kimura, M. (2010). Petrology and Raman spectroscopy of high pressure phases in the Gujba CB chondrite and the shock history of the CB parent body. Meteoritics & Planetary Science Volume 45, Issue 5, pages 873–884. (May 2010); Weisberg, M. K.; Kimura, M.; Suzuki, A.; Ohtani, E.; Sugiura, N. (2006). 37th Annual Lunar and Planetary Science Conference, March 13-17, 2006, League City, Texas, abstract no.1788. (March 2006).
    Norway
     
    • Møre og Romsdal
      • Haram
    Root, D.B. Hacker, B.R. Gans, P.B. Ducea, M.N. Eide, E.A. & Mosenfelder, J.L. ( 2005): Discrete ultrahigh-pressure domains in the Western Gneiss Region, Norway: implication for the formation and exhumation. Journal of Metamorphic Geology. 23, 45-61.
      • Ulstein
        • Hareidland
    Carswell et al.(2003): The timing of stabilisation and the exhumation rate for ultra-high pressure rocks in the Western Gneiss Region of Norway. Journal of Metamorphic Geology. 21, 601-612
    Carswell et al.(2003): The timing of stabilisation and the exhumation rate for ultra-high pressure rocks in the Western Gneiss Region of Norway. Journal of Metamorphic Geology. 21, 601-612
    • Sogn og Fjordane
      • Selje
    Carswell, D. A., Brueckner,H. K.,Cuthbert, S. J.,Mehta, K. & O'Brien,P. J. (2003): The timing of stabilisation and the exhumation rate for ultra-high pressure rocks in the Western Gneiss Region of Norway. Journal of Metamorphic Geology. 21, 601-612.
    Smith, D.C. (1984): Coesite in clinopyroxene in the Caledonides and its implication for geodynamics. Nature, 310, 641-644.
    Carswell, D. A., Brueckner,H. K.,Cuthbert, S. J.,Mehta, K. & O'Brien,P. J. (2003): The timing of stabilisation and the exhumation rate for ultra-high pressure rocks in the Western Gneiss Region of Norway. Journal of Metamorphic Geology. 21, 601-612.
      • Vågsøy
        • Måløy
    Smith, D.C. & Lappin, M.A. (1989): Coesite in the Straumen kyanite-eclogite pod, Norway. Terra Nova, I, 47-56
    Russia
     
    • Eastern-Siberian Region
      • Sakha Republic (Saha Republic; Yakutia)
        • Mirny
    Argunov, K. P., 1990, Inclusions of potassic phases, coesite and omphacite in a coated diamond crystal from the Mir pipe: Dokl. Akad. Nauk SSSR, v. 310, p. 129-140.
    Slovakia
     
    • Banská Bystrica Region
      • Rimavská Sobota Co.
    Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    South Africa
     
    • Free State Province
      • Fezile Dabi District
    Minerals of South Africa
    http://www.unb.ca/passc/ImpactDatabase/images/vredefort.htm Cairncross, B. and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa.
      • Lejweleputswa District
        • Boshof
    Am Min 62:828-830
    • Gauteng Province
      • Pretoria
    Minerals of South Africa
    USA
     
    • Arizona
      • Coconino Co.
        • Winslow
    Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 180; Chao, E.C.T., et al (1960), First natural occurrence of coesite, Science: 132: 220-222.
    • Colorado
      • Larimer Co.
    Minerals of Colorado (1997) Eckels, E. B.
    • Indiana
      • Newton Co.
        • Kentland
    Science. 1961 Nov 17;134(3490):1624-1625
    • Oklahoma
      • Major Co.
    Venezuela
     
    • Bolívar
    CanMin 38:1347-1370
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