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Nomenclature of Pyroxenes

  • N. Morimoto (a1), J. Fabries (a2), A. K. Ferguson (a3), I. V. Ginzburg (a4), M. Ross (a5), F. A. Seifert (a6), J. Zussman (a7), K. Aoki (a8) and G. Gottardi (a9)...


This is the final report on the nomenclature of pyroxenes by the Subcommittee on Pyroxenes established by the Commission on New Minerals and Mineral Names of the International Mineralogical Association. The recommendations of the Subcommittee as put forward in this report have been formally accepted by the Commission. Accepted and widely used names have been chemically defined, by combining new and conventional methods, to agree as far as possible with the consensus of present use. Twenty names are formally accepted, among which thirteen are used to represent the end-members of definite chemical compositions. In common binary solid-solution series, species names are given to the two end-members by the ‘50% rule’. Adjectival modifiers for pyroxene mineral names are defined to indicate unusual amounts of chemical constituents. This report includes a list of 105 previously used pyroxene names that have been formally discarded by the Commission.



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Bailey, S.W. (1977) Report of the IMA-IUCr joint committee on nomenclature. Am. Mineral. 62, 411-15.
Bokij, G.B., and Ginzburg, J.V. (1985) The systematics of mineral species in pyroxene family. Trans. IGG Academy of Sciences Novosibirsk, 610, 12-35.
Cameron, M., and Papike, J.J. (1981) Structural and chemical variations in pyroxenes. Am. Mineral. 66, 1-50.
Chester, A.H. (1886) Catalogue of Minerals. John Wiley and Sons, N.Y.
Cosca, M.A., and Peacor, D.R. (1987) Chemistry and structure of esseneite (CaFe3+A1SiO6), a new pyroxene produced by pyrometamorphism. Am. Mineral. 72, 148-56.
Curtis, L.W., and Gittins, J. (1979) Aluminous and titaniferous clinopyroxenes from regionally metamorphosed agpaitic rocks in central Labrador. J. petrol. 20, 165-86.
Dana, E.S. (1892) The System of Mineralogy, 6th ed. John Wiley and Sons, N.Y.
Deer, W.A., Howie, R.A., and Zussman, J. (1963) Rock-forming minerals, 1st ed., 2. Longman, Green and Co. Ltd., London.
Deer, W.A., Howie, R.A., and Zussman, J. (1978) Ibid., 2nd ed., 2A. Longman, U.K. and John Wiley and Sons Inc., N.Y.
Devine, J.D., and Sigurdsson, H. (1980) Garnet-fassaite calc-silicate nodule from La Soufriere, St. Vincent. Am. Mineral. 65, 302-5.
Dowty, E., and Clark, J.R. (1973) Crystal structure refinement and optical properties of a Tia + fassaite from the Allende meteorite. Ibid. 58, 230-40.
Essene, E.J., and Fyfe, W.S. (1967) Omphacite in California metamorphic rocks. Contrib. Mineral. Petrol. 15, 123.
and Peacor, D.R. (1987) Petedunnite (CaZnSi206), a new zinc clinopyroxene from Franklin, New Jersey, and phase equilibria for zincian pyroxenes. Am. Mineral. 72, 157-66.
Ford, W.E. (1932) A Textbook of Mineralogy, John Wiley and Sons, Inc., N.Y.
Jaffe, H.W., Jaffe, E.B., and Tracy, R.J. (1978) Orthoferrosilite and other iron-rich pyroxenes in microperthite gneiss of the Mount Marcy area, Adirondack Mountains. Am. Mineral. 63, 116-36.
Kobayashi, H. (1977) Kanoite, (Mn + +Mg)2[Si206], a new clinopyroxene in the metamorphic rock from Tatehira, Oshirna Peninsula, Hokkaido, Japan. J. Geol. Soc. Japan, 83, 537-42.
Leake, B.E., and Winchell, H. (1978) Nomenclature of amphiboles. Mineral. Mao. 42, 533-63.
Mason, B. (1974) Aluminium-titanium-rich pyroxenes, with special reference to the Allende meteorite. Ibid. 59, 1198-202.
Mellini, M., Merlino, S., Orlandi, P., and Rinaldi, R. (1982) Cascadite and jervisite, two new scandium silicates from Baveno, Italy. Ibid. 67, 597603.
Morimoto, N., and Kitamura, M. (1983) Q-J diagram for classification of pyroxenes. J. Japan. Assoc. Min. Petrol. Econ. Geol. 78, 141 (in Japanese).
Nickel, E.H., and Mandarino, J.A. (1988) Procedures involving the IMA Commission on New Minerals and Mineral Names, and guidelines on mineral nomenclature. Mineral. May. 52, 275-92.
Papike, J.J., ed. (1969) Pyroxenes and Amphiboles: Crystal chemistry and phase petrology. Mineral Soc. America, Special Paper No. 2.
Petersen, E.U., Anovitz, L.M., and Essene, E.J. (1984) Donpeacorite, (Mn,Mg)MgSi206, a new orthopyroxene and its proposed phase relations in the system MnSiO3MgSiO3FeSiO3. Am. Mineral. 69, 472-80.
Prewitt, C.T., ed. (1980) Reviews in Mineralogy, 7. Pyroxenes. Mineral. Soc. America, Washington D.C.
Robinson, P. (1980) The composition space of terrestrial pyroxenes-Internal and external limits. Ibid. 419-94.
Schaller, W.T. (1930) Adjectival ending of chemical elements used as modifiers to mineral names. Ibid. 15, 566-74.
Strunz, H. (1970) Mineralogische Tabellen, 5 Auflage, Akademische Verlagsgesellschaft Geest and Portig K.- G., Leipzig.
Tracy, R.J., and Robinson, P. (1977) Zonal titanian augite in alkali olivine basalt from Tahiti and the nature of titanium substitutions in augite. Am. Mineral. 62, 634-45.
Tschermak, G. (1897) Lehrbuch der Mineralogie, Alfred Holder, Wien.
Vieten, K., and Hamm, H.M. (1978) Additional notes 'On the calculation of the crystal chemical formula of clinopyroxenes and their contents of Fe3 + from microprobe analyses'. Neues Jahrb. Mineral., Mh. 7183.
Winchell, A.N., and Winchell, H. (1951) Elements of Optical Mineralogy, John Wiley and Sons, Inc., N.Y.


Nomenclature of Pyroxenes

  • N. Morimoto (a1), J. Fabries (a2), A. K. Ferguson (a3), I. V. Ginzburg (a4), M. Ross (a5), F. A. Seifert (a6), J. Zussman (a7), K. Aoki (a8) and G. Gottardi (a9)...


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