Nomenclature of amphiboles
TLDR
The Na-Ca-Mg-Fe-Mn-Li amphibole group was proposed in this article, which is defined by 0.50 apfu (atoms per formula unit), with members whittakerite and ottoliniite.Abstract:
The introduction of a fifth amphibole group, the Na-Ca-Mg-Fe-Mn-Li group, defined by 0.50 < B(Mg, Fe2+, Mn2+, Li) < 1.50 and 0.50 < = B(Ca, Na) < = 1.50 apfu (atoms per formula unit), with members whittakerite and ottoliniite, has been required by recent discoveries of B(LiNa) amphiboles. This, and other new discoveries, such as sodicpedrizite (which is herein slightly, but significantly changed from the original idealised formula), necessitate amendments to the IMA 1997 definitions of the Mg-Fe-Mn-Li, calcic, sodic-calcic and sodic groups. The discovery of obertiite and the finding of an incompatibility in the IMA 1997 subdivision of the sodic group, requires further amendments within the sodic group. All these changes, which have IMA approval, are summarised.read more
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Journal ArticleDOI
Nomenclature of amphiboles Report of the Subcommittee on Amphiboles of the International Mineralogical Association Commission on New Minerals and Mineral Names;Nomenclature of amphiboles Report of the Subcommittee on Amphiboles of the International Mineralogical Association Commission on New Minerals and Mineral Names
Bernard Elgey Leake,Alan R. Woolley,C. E. S. Arps,William D. Birch,M. C. Gilbert,Joel D. Grice,Ec. Hawthorne,A. Kato,Hanan J. Kisch,V. G. Krivovichev,K. Linthout,J. Laird,Joseph A. Mandarino,W. V. Maresch,Ernest H. Nickel,N. M. S. Rock,John C. Schumacher,D. C. Smith,Nicholas C.N. Stephenson,Luciano Ungaretti,Eric J.W. Whittaker,G. Youzhi +21 more
TL;DR: The International Mineralogical Association's approved amphibole nomenclature has been revised to simplify it, make it more consistent with divisions generally at 50%, define prefixes and modifiers more precisely, and include new amphibole species discovered and named since 1978, when the previous scheme was approved.
Journal ArticleDOI
Nomenclature of amphiboles; report of the subcommittee on amphiboles of the International Mineralogical Association, Commission on New Minerals and Mineral Names
TL;DR: The International Mineralogical Association's approved amphibole nomenclature has been revised to simplify it, make it more consistent with divisions generally at 50%, define prefixes and modifiers more precisely, and include new amphibole species discovered and named since 1978, when the previous scheme was approved.
Journal Article
Nomenclature of pyroxenes.
Nobuo Morimoto,J. Fabries,A. K. Ferguson,I. V. Ginzburg,M. Ross,F. A. Seifert,J. Zussman,K. Aoki,G. Gottardi +8 more
TL;DR: The Sous-Commission Pyroxenes creee par la Commission Nouveaux Mineraux et Noms de Mineraux (C.N.M.A) as discussed by the authors, who presente son rapport final sur la nomenclature des pyroxenes.
Journal ArticleDOI
Nomenclature of Pyroxenes
TL;DR: 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 as discussed by the authors.
Journal ArticleDOI
Amphibole composition in tonalite as a function of pressure: an experimental calibration of the Al-in-hornblende barometer
TL;DR: The Al-in-hornblende barometer, which correlates Altot content of magmatic hornblende linearly with crystallization pressure of intrusion (Hammarstrom and Zen 1986), has been calibrated experimentally under water-saturated conditions at pressures of 2.5-13 kbar and temperatures of 700-655°C.