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Clinoenstatite

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Formula:
MgSiO3
System:
Monoclinic
Colour:
Colourless, greenish ...
Lustre:
Vitreous
Hardness:
5 - 6
Polymorph of:
Isostructural with:

Classification of Clinoenstatite

Approved
9.DA.10

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
65.1.1.1

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
14.4.3

14 : Silicates not Containing Aluminum
4 : Silicates of Mg
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Physical Properties of Clinoenstatite

Vitreous
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Colourless, greenish yellow, yellowish brown, green-brown
Streak:
White
Hardness (Mohs):
5 - 6
Cleavage:
Distinct/Good

Crystallography of Clinoenstatite

Crystal System:
Monoclinic
Cell Parameters:
a = 9.6Å, b = 8.81Å, c = 5.17Å
β = 108.28°
Ratio:
a:b:c = 1.09 : 1 : 0.587
Unit Cell Volume:
V 415.19 ų (Calculated from Unit Cell)

Optical Data of Clinoenstatite

Type:
Biaxial (+)
RI values:
nα = 1.651 nβ = 1.654 nγ = 1.660
Max Birefringence:
δ = 0.009
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
strong

Chemical Properties of Clinoenstatite

Formula:
MgSiO3
Essential elements:
All elements listed in formula:
Common Impurities:
Ti,Al,Cr,Fe,Mn,Ca,Na

Relationship of Clinoenstatite to other Species

Other Members of Group:
AegirineNaFe3+Si2O6
Aegirine-augite(Na,Ca)(Fe3+,Fe2+,Mg,Al)Si2O6
Augite(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
ClinoferrosiliteFe2+SiO3
DiopsideCaMgSi2O6
EsseneiteCaFe3+[AlSiO6]
GrossmaniteCaTi3+ AlSiO6
HedenbergiteCaFe2+Si2O6
JadeiteNa(Al,Fe3+)Si2O6
Jervisite(Na,Ca,Fe2+)(Sc,Mg,Fe2+)Si2O6
JohannseniteCaMn2+Si2O6
KanoiteMn2+(Mg,Mn2+)Si2O6
KosmochlorNaCrSi2O6
KushiroiteCaAl[AlSiO6]
NamansiliteNaMn3+Si2O6
NatalyiteNa(V3+,Cr)Si2O6
Omphacite(Ca,Na)(Mg,Al)Si2O6
PetedunniteCa(Zn,Mn2+,Mg,Fe2+)Si2O6
Pigeonite(Mg,Fe2+,Ca)(Mg,Fe2+)Si2O6
SpodumeneLiAlSi2O6
9.DA.05Donpeacorite(Mn2+,Mg)Mg[SiO3]2
9.DA.05EnstatiteMgSiO3
9.DA.05FerrosiliteFeSiO3
9.DA.10ClinoferrosiliteFe2+SiO3
9.DA.10KanoiteMn2+(Mg,Mn2+)Si2O6
9.DA.10Pigeonite(Mg,Fe2+,Ca)(Mg,Fe2+)Si2O6
9.DA.15Augite(Ca,Na)(Mg,Fe2+,Al,Fe3+,Ti)[(Si,Al)2O6]
9.DA.15DiopsideCaMgSi2O6
9.DA.15EsseneiteCaFe3+[AlSiO6]
9.DA.15HedenbergiteCaFe2+Si2O6
9.DA.15JohannseniteCaMn2+Si2O6
9.DA.15PetedunniteCa(Zn,Mn2+,Mg,Fe2+)Si2O6
9.DA.15DavisiteCaScAlSiO6
9.DA.15KushiroiteCaAl[AlSiO6]
9.DA.15GrossmaniteCaTi3+ AlSiO6
9.DA.20Aegirine-augite(Na,Ca)(Fe3+,Fe2+,Mg,Al)Si2O6
9.DA.20Omphacite(Ca,Na)(Mg,Al)Si2O6
9.DA.25AegirineNaFe3+Si2O6
9.DA.25JadeiteNa(Al,Fe3+)Si2O6
9.DA.25Jervisite(Na,Ca,Fe2+)(Sc,Mg,Fe2+)Si2O6
9.DA.25KosmochlorNaCrSi2O6
9.DA.25NamansiliteNaMn3+Si2O6
9.DA.25NatalyiteNa(V3+,Cr)Si2O6
9.DA.30SpodumeneLiAlSi2O6
14.4.1ForsteriteMg2SiO4
14.4.2EnstatiteMgSiO3
14.4.4ChrysotileMg3(Si2O5)(OH)4
14.4.5Clinochrysotile
14.4.6Orthochrysotile
14.4.7Parachrysotile
14.4.8LizarditeMg3(Si2O5)(OH)4
14.4.9TalcMg3(Si4O10)(OH)2
14.4.10SpadaiteMgSiO2(OH)2 · H2O (?)
14.4.11SepioliteMg4(Si6O15)(OH)2 · 6H2O
14.4.12LoughliniteNa2Mg3Si6O16 · 8H2O
14.4.13EifeliteKNa3Mg4Si12O30
14.4.14Stevensite(Ca,Na)xMg3-x(Si4O10)(OH)2
14.4.15AntigoriteMg3(Si2O5)(OH)4
14.4.16 Magnesio-anthophyllite

Other Names for Clinoenstatite

Other Information

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

References for Clinoenstatite

Reference List:
Clark, J.R., D.E. Appleman, and J.J. Papike (1969) Crystal-chemical characterization of clinopyroxenes based on eight new structure refinements. MSA Special Paper 2: 31-50.

Canadian Mineralogist (1989): 27: 143.

Internet Links for Clinoenstatite

Localities for Clinoenstatite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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
 
  • Adrar Province
McCoy, T. J., Keil, K., Bogard, D., Casanova, I. & Lindstrom, M. M. (1992) ILAFEGH 009: A New Sample of the Diverse Suite of Enstatite Impact Melt Rocks (Abstract). LPSC XXIII: page 869. (March 1992)
Antarctica
AmMin 36:361-367
  • Eastern Antarctica
    • Transantarctic Mts
      • Buckley Island quadrangle
        • Lewis Cliff
Lindstrom, M. M., Ed. (1993) New meteorites: Antarctic Meteorite Newsletter 12 (1), 4-20. (March 1993)
Lindstrom, M. M., ed. (1990). New Meteorites. Antarctic Meteorite Newsletter 13 (2): 9-24. (March 1990)
    • Victoria Land
      • Allan Hills
Brian Mason (1978) Antarctic Meteorite Data Sheet, ALHA77397: Antarctic Meteorite Newsletter 1 (3). (Nov 1978)
Enstatite; Calcite, Clinoenstatite, Cristobalite, Daubréelite, Goethite, Gypsum, Nickel-iron, Plagioclase, Kamacite, Schreibersite , Troilite
Australia
 
  • Queensland
    • Charters Towers Region
      • South Gregory
        • Tenham Station
http://webmineral.com/specimens/picshow.php?id=2940; American Mineralogist, Volume 84, pages 267–271, 1999
  • South Australia
    • Mt Lofty Ranges
      • South Mt Lofty Ranges (Adelaide Hills)
        • Adelaide
Davy, R., Whitehead, S. G. & Pitt, G. (1978): The Adelaide Meteorite. Meteoritics 13 (1): 121-140. (March 1978)
    • Olary Province
      • Mt Victor Plumbago Station
No reference listed
  • Victoria
    • City of Greater Shepparton
      • Murchison
Louis H. Fuchs, Kenneth J. Jensen & Edward Olsen (1970). Mineralogy and Composition of the Murchison Meteorite. Meteoritics 5, #4, p. 198. (Dec 1970).
  • Western Australia
    • Mount Marshall Shire
      • Bencubbin
Horton E. Newsom & Michael J. Drake (1977). Metal Fractionation Patterns in the Bencubbin Meteorite. Meteoritics 12, p. 326.
    • Ngaanyatjarraku Shire
      • West Musgrave Block
        • Wingellina Community
Trommsdorff, V., and Wenk, H.-R. (1968): Contributions to Mineralogy and Petrology 19, 158-168.
Austria
 
  • Styria
    • Bad Gleichenberg
      • Kapfenstein
Collection of NHM, Vienna
Azerbaijan
 
  • Naxçıvan District (Naxcivan; Nakhichevan)
    • Shusha
http://rruff.geo.arizona.edu/doclib/hom/roedderite.pdf.; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; American Mineralogist, Volume 93, pages 902–909, 2008
Brazil
 
  • Minas Gerais
Jour. of South American Earth Sci. 15:709–723
Canada
 
  • Alberta
    • Abee
Brian Harold Mason (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30.
China
 
  • Anhui Province
    • Anqing Prefecture
      • Yuexi Co.
T21A-0507 0800h : Clinoenstatite Exsolution in Diopside of Dabieshan, China - Evidence of Origin $>$ 250km Tectonophysics 2004 Fall Meeting
    • Bozhou Prefecture
      • Qiaocheng District
        • Xiaoyanzhuang
Kuiren Wang and Junxin Wang (1987): Acta Mineralogica Sinica 7(3), 238-244
  • Guizhou Province
    • Guiyang Prefecture
      • Qingzhen Co.
Daode Wang and Rambaldi, E.R. (1988): Acta Mineralogica Sinica 8(4), 324-335
  • Jilin Province (Manchuria; Dongbei Region)
    • Jilin Prefecture
      • Chuanying District
Wankang Huang, Yingwen Xie, and Jingming Pan (1978): Geochimica 7(1), 25-34
Egypt
 
  • New Valley Governorate
Methot, R. L. et al., (1975) Mineralogy, petrology and chemistry of the Isna (C3) meteorite. Meteoritics 10 (2): 121-131. (Jun 1975)
France
 
  • Auvergne
    • Puy-de-Dôme
      • Châtelguyon
        • Charbonnières-les-Varennes
C. Lemanski, Jr. (re-entry of lost Mindat data).
      • Rochefort-Montagne
        • Vernines
collected by François Périnet
      • Tauves
        • Avèze
collected by François Périnet
        • Singles
collected by François Périnet
  • Centre
    • Loir-et-Cher
Rhian H. Jones & Adrian J. Brearley. (1994). Reduced, Plagioclase-rich Chondrules in the Lancé and Kainsaz CO3 Chondrites. Abstracts of the 25th Lunar and Planetary Science Conference. p. 641. (March 1994).
    • Loiret
      • Gien
collected by François Périnet
  • Midi-Pyrénées
    • Haute-Garonne
Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966)
Greenland
 
  • Sermersooq
Kent Brooks, R.G Platt (1975): Kaersutite-bearing gabbroic inclusions and the late dike swarm of Kangerdlugssuaq, East Greenland. Mineralogical Magazine Vol 40 pp 259-283
Hungary
 
  • Veszprém Co.
    • Balaton Uplands
      • Tapolcai Basin
        • Uzsa (Uzsabánya)
Szakáll & Gatter, 1993
India
 
  • Madhya Pradesh
Jones, R. H. (1994) Petrology of FeO-poor, porphyritic pyroxene chondrules in the Semarkona chondrite G&CA 58 (23), 5325-5340 (Dec 1994)
  • Orissa
    • Maurbhanj
      • Deoli pargana
Reid, A. M., Buchanan, P. C., Zolensky, M. E., Nicols, R. H. & Barrett, R. A. (1990) The Bholgati Howardite: Petrography and mineral chemistry. G&CA 54 (8): 2161-2166. (Aug 1990)
  • Tamil Nadu
Brearley, A. J. (1988) Nature and Origin of Matrix in the Unique Chondrite, Kakangari: A TEM Investigation, Lunar and Planetary Science XIX, 130-131. (March 1988)
  • Uttar Pradesh
    • Azamgarh District
Ruzicka, A. (1990). Deformation and thermal histories of chondrules in the Chainpur (LL3.4) chondrite, Meteoritics 25 (2): 101-113. (June 1990)
Italy
 
  • Emilia-Romagna
    • Ferrara Province
      • Cento
        • Renazzo
Brian Mason & H. B. Wiik (1962). The Renazzo meteorite. American Museum Novitates, #2106.
      • Vigarano Mainarda
        • Vigarano Pieve
Abreu, N. M. & Brearley, A. J. (2011): Deciphering the nebular and asteroidal record in silicates and organic material in the matrix of the reduced CV3 chondrite Vigarano: Meteoritics & Planetary Science 46 (2): 252-274. (Feb 2011).
Japan
 
  • Tokyo Metropolis
    • Ogasawara Islands
      • Chichijima Group
Forrest Cureton specimens
Wada (1904): Minerals of Japan; Alfredo Petrov collection
      • Mukojima Group
Akira Kato (2011) Explanations of distributed specimens at the Ordinary Meeting of Mumeikai Group, No. 34 (January, 2011).
Malawi
 
Brian Mason (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30.
New Caledonia
 
  • Northern Province
    • Poya North Commune
      • Népoui
T. Sameshima et al. , Am. Min. , 1983, 68, pp. 1076-1082. / C. Campiglio et al. , Bull. Minéral. , 1986, 109, pp. 423-440.
Norway
 
  • Telemark
Haas,Gerardus Johannes Lambertas Maria de (2012) Source,Evolution,And Age Of Coronitic Gabbros From The Aredal-Nelaug Area,Bamble,Southeast Norway
Outer Space
European Journal of Mineralogy; December; v. 19; no. 6; p. 771-782; DOI: 10.1127/0935-1221/2007/0019-1766
Pakistan
 
  • Gilgit-Baltistan (Northern Areas)
    • Astor District (Astore District)
      • Astor valley (Astore valley)
P Haas collection
  • Punjab
Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966); Keil, K. (1968). Mineralogical and Chemical Relationships among the Enstatite Chondrites. Journal of Geophysical Research 73 (22): 6945-6976. (Nov 1968)
Poland
 
  • Lubelskie
    • Zamość
Przylibski, T. A., Zagozdzon, P. P., Kryza, R. & Pilski, A. S. (2005) The Zaklodzie enstatite meteorite: Mineralogy, petrology, origin, and classification. Meteoritics & Planetary Science 40 (S9): A185-A2000. (Sept 2005)
  • Łódzkie
    • Łowicz District
Karwowski Ł. 2003: The new mineralogical data on the Łowicz meteorite. Mineralogical Society of Poland - Special Papers, vol. 22, pp. 102-104
Romania
 
  • Bistrița-Năsăud Co.
    • Rodna Mtn (Rodnei Mtn)
      • Rodna
        • Valea Vinului
Delia Cristina Papp, Ionel Ureche, Ioan Seghedi, Hilary Downes, Luigi Dallai, (2005), Petrogenesis of convergent-margin calc-alkaline rocks and the significance of the low oxygen isotope ratios: the Rodna-Bârgău Neogene subvolcanic area (Eastern Carpathians), Geologica Carpathica, 56, 1, p.77-90
  • Harghita Co.
Pál-Molnár (2000)
  • Mureş Co.
Michel‐Lévy, M. C. (1988). A New Component of the Mezö‐Madaras Breccia: A Microchondrule‐and Carbon‐Bearing L‐Related Chondrite. Meteoritics, 23(1), 45-48.
Russia
 
  • Far-Eastern Region
    • Koriak Autonomous Okrug
      • Koryak Upland (Koriak; Koriakskhiye)
        • Iomrautvaam Massif
          • Chetkinvaiam tectonic melange
            • Khatyrka river
              • Listvenitovyi Stream
Scientific Report 5:9111
Slovakia
 
  • Banská Bystrica Region
    • Lučenec Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
    • Rimavská Sobota Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Sudan
 
  • Kassala Wilayah
    • Gash delta
Hey, M. H. & Easton, A. J. in Geochimica et Cosmochimica Acta 31(10):1789-1790 (1967)
Switzerland
 
  • Bern
    • Utzenstorf
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 500
  • Ticino (Tessin)
    • Riviera
      • Bellinzona
        • Gorduno
Science, 2 April 1999, Vol. 284
The Moon
J. Frondel (2009), Lunar Mineralogy, Wiley Interscience
  • Mare Fecunditatis
Gornostaeva T.A., Kartashov P.M., Mokhov A.V., Bogatikov O.A. (2012) Native rhodium-bearing ferroplatinum in the Lunar regolith sample from the Mare Fecundidatis, - Doklady Earth Sciences, 444(2), p. 770-772.
USA
 
  • California
    • San Bernardino Co.
      • Amboy
Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 307; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 386.
  • Colorado
    • Kit Carson Co.
Mason, B. H. (1966). The Enstatite Chondrites. Geochimica et Cosmochimica Acta 30, 23-30. (Jan 1966).
  • Kansas
    • Decatur Co.
Workshop on Parent-Body and Nebular Modification of Chondritic Materials 4038.pdf http://www.lpi.usra.edu/meetings/chondrite/pdf/4038.pdf
    • Norton Co.
Akihiko Okada, Klaus Keil & G. J. Taylor (1980). The Norton County enstatite achondrite: A brecciated, plutonic igneous rock. Abstracts of Papers Presented at the Forty-Third Annual Meeting of the Meteoritical Society. LPI Contribution 412, edited by Paula Criswell, published by the Lunar and Planetary Institute: Houston, p.170.
  • Kentucky
    • Whitley Co.
Alan E. Rubin (2010). Impact melting in the Cumberland Falls and Mayo Belwa aubrites. Meteoritics & Planetary Science 45, #2, 265-275.
  • Nevada
    • Eureka Co.
Peter G. Vikre (1998) Intrusion-related, polymetallic carbonate replacement deposits in the Eureka district, Eureka County, Nevada. Nevada Bureau of Mines and Geology Bulletin 110
        • Prospect Ridge
Peter G. Vikre (1998) Intrusion-related, polymetallic carbonate replacement deposits in the Eureka district, Eureka County, Nevada. Nevada Bureau of Mines and Geology Bulletin 110
    • Pershing Co.
NBMG Spec. Pub. 31 Minerals of Nevada
  • New Mexico
    • Santa Fe Co.
      • La Bajada District
Minerals of New Mexico 3rd ed.
Minerals of New Mexico 3rd ed.
Minerals of New Mexico 3rd ed.
    • Sierra Co.
Minerals of New Mexico 3rd ed.
  • New York
    • Orange Co.
      • Town of Monroe
        • Lake Mombasha
Lupulescu, Marian: Rocks& Min. -- May/June 2008
  • Oklahoma
    • Washita Co.
Rubin, A. E., James, J. A., Keck, B. D., Weeks, K. S., Sears, D. W. G. & Jarosewich, E. (1985) The Colony meteorite and variations in CO3 chondrite properties. Meteoritics 20(2, part 1): 175-196. (June 1985)
  • Texas
    • Armstrong Co.
Olsen, E. J., Bunch, T. E., Jarosewich, E., Noonan, A. F. & Huss, G. I. (1977) Meteoritics 12 (2), 109-123. (June 1977)
    • Grayson Co.
Davis, A. M. & Olsen, E. (1984). Carbonaceous Chondrite Related to c1 and c2 Chondrites (Abstract). Lunar and Planetary Science XV, 190-191. (March 1984)
    • Lubbock Co.
Meteoritics (ISSN 0026-1114), vol. 24, Dec. 1989, p. 195-208.
  • Washington
    • Clark Co.
      • Washougal
Cannon, B. (1975): Minerals of Washington, p.85
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