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Clinoenstatite

Formula:
Mg
 
2
[Si
 
2
O
 
6
]
System:MonoclinicColour:Colourless, greenish ...
Lustre:VitreousHardness:5 - 6

Classification of Clinoenstatite

IMA status:Approved
Strunz 8th edition ID:8/F.01-10
Nickel-Strunz 10th (pending) edition ID:9.DA.10

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family
Dana 8th edition ID:65.1.1.1

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
1 : Single-Width Unbranched Chains, W=1 with chains P=2
Hey's CIM Ref.:14.4.3

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

Lustre: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
Maximum Birefringence:δ = 0.009

Chart 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:
Mg
 
2
[Si
 
2
O
 
6
]
Essential elements:Mg, O, Si
All elements listed in formula:Mg, O, Si
Common Impurities:Ti,Al,Cr,Fe,Mn,Ca,Na

Relationship of Clinoenstatite to other Species

Member of Group:
Clinopyroxene Subgroup:
Related Minerals - Nickel-Strunz Grouping):

- +
9.DA.05Donpeacorite
(Mn
2+
 
,Mg)Mg[SiO
 
3
]
 
2
9.DA.05Enstatite
Mg
 
2
[SiO
 
3
]
 
2
9.DA.05Ferrosilite
Fe
 
2
[SiO
 
3
]
 
2
9.DA.10Clinoferrosilite
Fe
2+
 
(Fe
2+
 
,Mg)[Si
 
2
O
 
6
]
9.DA.10Kanoite
Mn
2+
 
(Mg,Mn
2+
 
)[Si
 
2
O
 
6
]
9.DA.10Pigeonite
(Mg,Fe
2+
 
,Ca)(Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.15Augite
(Ca,Na)(Mg,Fe
2+
 
,Al,Fe
3+
 
,Ti)[(Si,Al)
 
2
O
 
6
]
9.DA.15Diopside
CaMg[Si
 
2
O
 
6
]
9.DA.15Esseneite
CaFe
3+
 
[AlSiO
 
6
]
9.DA.15Hedenbergite
CaFe
2+
 
[Si
 
2
O
 
6
]
9.DA.15Johannsenite
CaMn
2+
 
[Si
 
2
O
 
6
]
9.DA.15Petedunnite
Ca(Zn,Mn
2+
 
,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.15Davisite
CaScAlSiO
 
6
9.DA.15Kushiroite
CaAl[AlSiO
 
6
]
9.DA.15Grossmanite
CaTi
3+
 
AlSiO
 
6
9.DA.20Aegirine-augite
(Na,Ca)(Fe
3+
 
,Fe
2+
 
,Mg,Al)Si
 
2
O
 
6
9.DA.20Omphacite
(Ca,Na)(Mg,Al)[Si
 
2
O
 
6
]
9.DA.25Aegirine
NaFe
3+
 
[Si
 
2
O
 
6
]
9.DA.25Jadeite
Na(Al,Fe
3+
 
)[Si
 
2
O
 
6
]
9.DA.25Jervisite
(Na,Ca,Fe
2+
 
)(Sc,Mg,Fe
2+
 
)[Si
 
2
O
 
6
]
9.DA.25Kosmochlor
NaCr[Si
 
2
O
 
6
]
9.DA.25Namansilite
NaMn
3+
 
[Si
 
2
O
 
6
]
9.DA.25Natalyite
Na(V
3+
 
,Cr)[Si
 
2
O
 
6
]
9.DA.30Spodumene
LiAl[Si
 
2
O
 
6
]
Related Minerals - Hey's Index Grouping:

- +
14.4.1Forsterite
Mg
 
2
[SiO
 
4
]
14.4.2Enstatite
Mg
 
2
[SiO
 
3
]
 
2
14.4.4Chrysotile
Mg
 
3
Si
 
2
O
 
5
(OH)
 
4
14.4.5Clinochrysotile
14.4.6Orthochrysotile
14.4.7Parachrysotile
14.4.8Lizardite
Mg
 
3
[(OH)
 
4
|Si
 
2
O
 
5
]
14.4.9Talc
Mg
 
3
Si
 
4
O
 
10
(OH)
 
2
14.4.10Spadaite
MgSiO
 
2
(OH)
 
2
·H
 
2
O
14.4.11Sepiolite
Mg
 
4
Si
 
6
O
 
15
(OH)
 
2
·6H
 
2
O
14.4.12Loughlinite
Na
 
2
Mg
 
3
Si
 
6
O
 
16
·8H
 
2
O
14.4.13Eifelite
KNa
 
3
Mg
 
4
Si
 
12
O
 
30
14.4.14Stevensite
(Ca,Na)
 
x
Mg
 
3
Si
 
4
O
 
10
(OH)
 
2
14.4.15Antigorite
(Mg,Fe
2+
 
)
 
3
[(OH)
 
4
|Si
 
2
O
 
5
]
14.4.16 Magnesio-anthophyllite

Other Names for Clinoenstatite

Other Languages:
German:Clinoenstatit
Klinoenstatit
Klinoenstenit
Russian:Клиноэнстатит
Spanish:Clinoenstatita

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 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

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  • Raman and XRD data at RRUFF project
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    Localities for Clinoenstatite

    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.
    Antarctica
    AmMin 36:361-367
    AmMin 36:361-367
    Australia
     
    • Queensland
      • South Gregory
        • Tenham Station
    http://webmineral.com/specimens/picshow.php?id=2940; American Mineralogist, Volume 84, pages 267–271, 1999
    • South Australia
      • Olary Province
        • Plumbago homestead
    No reference listed
    • Western Australia
      • Wyngelina
    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 (Naxcivan; Nakhichevan) District
      • 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
     
    • Southeast Region
      • Minas Gerais
    Jour. of South American Earth Sci. 15:709–723
    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
    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
      • Loiret
        • Gien
    collected by François Périnet
    Hungary
     
    • Veszprém Co.
      • Tapolcai Basin
        • Uzsa (Uzsabánya)
    Szakáll & Gatter, 1993
    Japan
     
    • Tokyo Prefecture
      • Ogasawara Islands
        • Chichijima Group
    Forrest Cureton specimens
    Wada (1904): Minerals of Japan; Alfredo Petrov collection
        • Mukojima Group
    Alfredo Petrov collection
    New Caledonia
     
    • Northern Province
      • Nouméa Commune
        • Népoui
    T. Sameshima et al. , Am. Min. , 1983, 68, pp. 1076-1082. / C. Campiglio et al. , Bull. Minéral. , 1986, 109, pp. 423-440.
    Pakistan
     
    • Northern Areas
      • Astor District (Astore District)
    P Haas collection
    Romania
     
    • Harghita Co.
    Slovakia
     
    • Banská Bystrica Region
      • Cérová Mts
    Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
    Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
    Sudan
     
    • Kassala
      • 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
    USA
     
    • 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
    • Nevada
      • 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.
        • Monroe Township
          • Lake Mombasha
    Lupulescu, Marian: Rocks& Min. -- May/June 2008
    • Texas
      • 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
    Mineral and/or Locality
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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: 22nd Oct 2009 17:52:17