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Coesite

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
This page provides mineralogical data about Coesite.

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
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
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
Spanish:Coesita

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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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Coesite in the Natural History Museum (London) online catalogue
  • Coesite details from Handbook of Mineralogy (PDF)
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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.
    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
     
    • Southeast Region
      • 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.
    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".
        • Susong Co.
    www.scienceinchina.com/ky/0008/ky0748.pdf.
        • Taihu Co.
    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.
          • Wumiao
    A.I. Okay et al. , Eur. J. Mineral. , 1989, 1, pp. 595-598.
            • Marble quarry
    • Henan Province
      • 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.
    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.
    • Qinghai (Chinghai) Province
      • Haixi Autonomous Prefecture
        • North Qaidam UHP Terrane
    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 Gold Province
        • Weihai Prefecture
          • Rongcheng Co.
    Science, Vol. 278, 24 Oct. 1997, pp. 701-707.
      • Jinan Prefecture
        • Jinan City
          • Licheng District
            • Qinglong Mt.
    Am. Min. , V 89, pp. 1772-1783, 2004.
      • Linyi Prefecture
        • Yimeng Mts (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
        • Rizhao City
    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".
    Hongrui Fan, Jinghui Guo, Fangfang Hu, Xuelei Chu, and Chengwei Jin (2005): Acta Petrologica Sinica 21(4), 1125-1132.
    • Tibet Autonomous Region
      • Shannan (Lhokha; Lhoka) Prefecture
        • Qusum (Qusong) Co.
    Wenji Bai, Nicheng Shi, Qingsong Fang, Guowu Li, Ming Xiong, Jingsui Yang, and He Rong (2006): Acta Geologica Sinica 80(5), 656-659.
    • Xinjiang (Xinjiang-Uygur) Autonomous Region
      • Bayin'gholin (Bayingolin; Bayinguoleng) Autonomous Prefecture
        • Ruoqiang (Qakilik; 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.
    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.
    • Piedmont
      • Cuneo Province
    [MinRec 27:303]
          • 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
     
    • Kökshetaü Oblysy (Kokshatau [Kokchetav] Oblast')
    International Geology Review, V. 44, N. 9, 1st Sept. 2002, pp. 831-836.
    Norway
     
    • More og Romsdal
      • Haram
    http://www.ngu.no/FileArchive/165/2003_055.pdf Geological Survey of Norway / The Alice Wain Memorial West Norway Eclogite Field Symposium / Abstract Volume p. 8.
      • Ulstein
        • Hareidland
    J. Metam. Geol. , 2003, 21, pp. 601-612.
    J. Metam. Geol. , 2003, 21, pp. 601-612.
    • Sogn og Fjordane
      • Selje
    J. Metam. Geol. , 2003, 21, pp. 601-612.
      • Stadlandet
    J. Metam. Geol. , 2003, 21, pp. 601-612.
      • Vågsøy
        • Måløy
    Smith, 1985, 1988; Smith and Lappin, 1989.
    Slovakia
     
    • Banská Bystrica Region
      • Western Slovenské Rudohorie Mts
    Koděra et all.,1990: Topografická mineralógia Slovenska, I-III, 1590p
    South Africa
     
    • Free State Province
      • Boshof
    Am Min 62:828-830
    Minerals of South Africa
    http://www.unb.ca/passc/ImpactDatabase/images/vredefort.htm
    • 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
    • Oklahoma
      • Major Co.
    Venezuela
     
    • Bolívar
    CanMin 38:1347-1370
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 5th Nov 2009 03:43:49