Clinopyroxene Subgroup

Dhofar 925 Lunar meteorite, Dhofar (Al Janubiyah) Province, Oman
© Chinellato Matteo

A subgroup name for monoclinic Pyroxene Group minerals. Members include Aegirine, Augite, Clinoenstatite, Clinoferrosilite, Diopside, Esseneite, Hedenbergite, Jadeite, Jervisite, Johannsenite, Kosmochlor, Kanoite, Namansilite, Natalyite, Petedunnite, Pigeonite, and Spodumene.

A subgroup name for monoclinic Pyroxene Group minerals.

Members include Aegirine, Augite, Clinoenstatite, Clinoferrosilite, Diopside, Esseneite, Hedenbergite, Jadeite, Jervisite, Johannsenite, Kosmochlor, Kanoite, Namansilite, Natalyite, Petedunnite, Pigeonite, and Spodumene.

Classification of Clinopyroxene Subgroup

mindat.org URL:

http://www.mindat.org/min-7630.html
Please feel free to link to this page.

Other Names for Clinopyroxene Subgroup

Synonyms:

Clinopyroxene

Polyaugite

Other Languages:

German:	Klinopyroxen Polyaugit
Spanish:	Polyaugita

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 Clinopyroxene Subgroup

Reference List:

Hess, H.H. (1949), Chemical composition and optical properties of common clinpyroxenes American Mineralogist: 34: 621-666.

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.

Hollister, L.S. and Gancarz, A. (1971) Compositional sector-zoning in clinopyroxene from the Narce area, Italy. American Mineralogist: 56: 959-979.

Fleet, M.E. (1975c) Growth habits of clinopyroxene. Canadian Mineralogist: 13: 336-341.

Newton, R.C., Charlu, T.V., and Kleppa, O.J. (1977) Thermochemistry of high pressure garnets and clinopyroxenes in the system CaO-MgO-Al2O3-SiO2. Geochimica et Cosmochimica Acta: 41: 369-377.

McCallister, R.H. (1978), The coarsening kinetics associated with exsolution in an iron-free clinopyroxene: Contributions to Mineralogy and Petrology: 65: 327-331.

Nord, G.L., & R.H. McCallister (1979), Kinetics and mechanisms of decomposition in Wo25En31Fs44 clinopyroxene: Geological Society of America, Abstracts with program: 11: 488.

Grove, T.L. (1982), Use of exsolution lamellae in lunar clinopyroxenes as cooling rate speedometers: an experimental calibration: American Mineralogist: 67: 251-268.

Harlow, G.E. and Veblen, D.R. (1991) Potassium in clinopyroxene inclusions from diamonds. Science: 251: 652-655.

Edgar, A.D. and Vukadinovic, D. (1993) Potassium-rich clinopyroxene in the mantle: an experimental investigation of K-rich lamproite up to 60 kbar. Geochimica et Cosmochimica Acta: 57: 563-5072.

Webb, S.L. and Jackson, I. (1993) The pressure dependence of the elastic moduli of single-crystal orthopyroxene (Mg0.8Fe0.2)SiO3. European Journal of Mineralogy: 5: 1111-1119.

Weinbruch, S. & W.F. Müller (1995), Constraints on nthe cooling rates of chondrules from the microstructure of clinopyroxene and plagioclase: Geochimica et Cosmochimica Acta: 59: 3221-3230.

Harlow, G.E. (1997) K in clinopyroxene at high pressure and temperature: an experimental study. American Mineralogist: 82: 259-269.

Hugh-Jones, D.A. (1997) Thermal expansion of MSiO3 and FeSiO3 ortho- and clinopyroxenes. American Mineralogist: 82: 689-696.

Zhang, L., Ahsbahs, H., Hafner, S.S., and Kutoglu, A. (1997) Single-crystal compression and crystal structure of clinopyroxene up to 10 GPa. American Mineralogist: 82: 245-258.

Arlt, T. and Angel, R. (2000) Displacive phase transitions in C-centered clinopyroxenes: spodumene, LiScSi2O6, and ZnSiO3. Physics and Chemistry of Minerals: 27: 719-731.

Arlt, T., Kunz, M., Stolz, J., Armbruster, T., and Angel, R. (2000) P-T-X data on P2 1/c-clinopyroxenes and their displacive phase transitions Contributions to Mineralogy and Petrology: 138: 35-45.

Boffa Ballaran, T., Carpenter, M.A., and Ross, N.L. (2001) Infrared powder-absorption spectroscopy of Ca-free P21/c clinopyroxenes. Mineralogical Magazine: 65: 339-350.

Chudinovskikh, L.T., Zharikov, V.A., Ishbulatov, R.A., and Matveev, Yu.A. (2001) On the mechanism of incorporation of ultra-high amounts of potassium into clinopyroxene at high pressure. Doklady Rossikoi Akademii Nauk. Earth Sciences: 380: 1-4.

Weinbruch, S., W.F. Müller & R.H. Hewins (2001), A transmission electron microscope study of exsolution and coarsening in iron-bearing clinopyroxene fro m synthetic analogues of chondrules: Meteoritics and Planetary Science: 36: 1237-1248.

Bindi, L., Safonov, O.G., Litvin, Y.A., Perchuk, L.L., and menchetti, S. (2002) Ultrahigh potassium content in the clinopyroxene structure: an X-ray single-crystal study. European Journal of Mineralogy: 14: 929-934.

Perchuk, L.L., Safonov, O.G., Yapaskurt, V.O., and Barton, J.M., Jr. (2002) Crystal-melt equilibria involving potassium-bearing clinopyroxene as indicators on mantle-derived ultrahigh-potassic liquids: an analytical review. Lithos: 60(3-4): 89-111.

Tribaudino, M. and Nestola, F. (2002) Average and local structure in P2 1/c clinopyroxenes along the join diopside-enstatite (CaMgSi2O6). European Journal of Mineralogy: 14: 549-555.

Bindi, L. Safonov, O.G., Yapasurt, V., Perchuk, L.L., and Menchetti, S. (2003) Ultrapotassic clinopyroxene from the Kumdy-Kol microdiamond mine, Kokchetav Complex, Northern Kazakhstan: occurrence, composition and crystal-chemical characterization. American Mineralogist: 88: 464-468.

Weinbruch, S., S. Styrsa, & W.F. Müller (2003), Exsolution and coarsening in iron-free clinopyroxene during isothermal annealing: Geochimica et Cosmochimica Acta: 67: 5071-5082.

Kung, J., Li, B.S., Uchida, T., Wang, Y.B., Neuville, D., and Liebermann, R.C. (2004) In situ measurements of sound velocities and densities across the orthopyroxene - high-pressure clinopyroxene transition in MgSiO3 at high-pressure. Physics of the Earth and Planetary Interiors: 147: 27-44.

Yang, H. and Konzett, J. (2005) Crystal chemistry of a high-pressure C2/c clinopyroxene with six-coordinated silicon. American Mineralogist: 90: 1223-1226.

Seto, Y., Ohi, S., Shimobayashi, N., Kitamura, M., Miyake, A., Hiroi, Y., and Grantham, G.H. (2006) Clinopyroxene exsolution in wollastonite from Namaqualand granulite, South Africa. American Mineralogist: 91: 446-450.