Nomenclature of Amphiboles: Additions and Revisions to the International Mineralogical Association's Amphibole Nomenclature

Bernard E. Leake; Alan R. Woolley; William D. Birch; Ernst A.J. Burke; Giovanni Ferraris; Joel D. Grice; Frank C. Hawthorne; Hanan J. Kisch; Vladimir G. Krivovichev; John C. Schumacher; Nicholas C.N. Stephenson; Eric J.W. Whittaker

Nomenclature of Amphiboles: Additions and Revisions to the International Mineralogical Association's Amphibole Nomenclature

Bernard E. Leake, Alan R. Woolley, William D. Birch, Ernst A.J. Burke, Giovanni Ferraris, Joel D. Grice, Frank C. Hawthorne, Hanan J. Kisch, Vladimir G. Krivovichev, John C. Schumacher, Nicholas C.N. Stephenson, Eric J.W. Whittaker

Department of Earth and Environmental sciences

Research output: Contribution to journal › Article › peer-review

152 Scopus citations

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 idealized 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 summarized.

Original language	English
Pages (from-to)	883-887
Number of pages	5
Journal	American Mineralogist
Volume	89
Issue number	5-6
State	Published - 1 Jan 2004

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology

Cite this

Leake, B. E., Woolley, A. R., Birch, W. D., Burke, E. A. J., Ferraris, G., Grice, J. D., Hawthorne, F. C., Kisch, H. J., Krivovichev, V. G., Schumacher, J. C., Stephenson, N. C. N., & Whittaker, E. J. W. (2004). Nomenclature of Amphiboles: Additions and Revisions to the International Mineralogical Association's Amphibole Nomenclature. American Mineralogist, 89(5-6), 883-887.

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title = "Nomenclature of Amphiboles: Additions and Revisions to the International Mineralogical Association's Amphibole Nomenclature",

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 idealized 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 summarized.",

author = "Leake, {Bernard E.} and Woolley, {Alan R.} and Birch, {William D.} and Burke, {Ernst A.J.} and Giovanni Ferraris and Grice, {Joel D.} and Hawthorne, {Frank C.} and Kisch, {Hanan J.} and Krivovichev, {Vladimir G.} and Schumacher, {John C.} and Stephenson, {Nicholas C.N.} and Whittaker, {Eric J.W.}",

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T2 - Additions and Revisions to the International Mineralogical Association's Amphibole Nomenclature

AU - Leake, Bernard E.

AU - Woolley, Alan R.

AU - Birch, William D.

AU - Burke, Ernst A.J.

AU - Ferraris, Giovanni

AU - Grice, Joel D.

AU - Hawthorne, Frank C.

AU - Kisch, Hanan J.

AU - Krivovichev, Vladimir G.

AU - Schumacher, John C.

AU - Stephenson, Nicholas C.N.

AU - Whittaker, Eric J.W.

PY - 2004/1/1

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N2 - 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 idealized 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 summarized.

AB - 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 idealized 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 summarized.

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Nomenclature of Amphiboles: Additions and Revisions to the International Mineralogical Association's Amphibole Nomenclature

Abstract

ASJC Scopus subject areas

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