Download Amphiboles: Crystal Chemistry Phase Relations and Occurrence by W. G. Ernst PDF

By W. G. Ernst

ISBN-10: 3642461409

ISBN-13: 9783642461408

This sequence of monographs represents continuation on a global foundation of the former sequence MINERALOGIE UNO PETROGRAPHIE IN EINZELOARSTELLUNGEN, released via Springer-Verlag. The voluminous effects coming up from fresh development in natural and utilized re­ seek elevate the necessity for authoritative reports however the regular clinical journals are not able to supply the distance for them. by way of their very nature, text-books are not able to think about particular themes intensive and up to date examine met'hods and effects frequently obtain simply cursory deal with­ ment. complex reference volumes are typically too precise with the exception of specialists within the box. it is usually very dear to buy a symposium quantity or an "Advances in . . . " quantity for the sake of a selected overview bankruptcy surrounded by means of unrelated chapters. we are hoping that this monograph sequence will by-pass those difficulties in gratifying the necessity. the aim of the sequence is to put up, at average costs, reports and reviews of care­ absolutely chosen subject matters written via rigorously chosen authors, who're either stable writers and specialists of their clinical box. in most cases, the mono­ graphs may be all in favour of the latest examine tools and effects. The editors wish that the monographs will serve numerous services, appearing as vitamins to latest text-books, guiding examine employees, and delivering the foundation for complex seminars. August 1967 W. VON ENGELHARDT, Tiibingen T. HAHN, Aachen R. Roy, college Park, Pa. J. W. WINCHESTER, Ann Arbor, Mich. P. J. WYLLIE, Chicago, Ill.

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Extra info for Amphiboles: Crystal Chemistry Phase Relations and Occurrence

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Ordering of cations among octahedral sites in both cummingtonite-grunerite and tremolite-actinolite series (BURNS, 1966; BURNS and STRENS, 1966) means that exchange equilibria involving these amphiboles cannot be explained adequately based on ideal solution theory models. Unpublished work by the present author dealing with coexisting glaucophanes + actinolites reveals somewhat similar relationships to those elucidated by MUELLER (1960, 1962). Analyses were performed using an electron microprobe, so as with MUELLER'S study, distinction between ferrous and ferric iron was not practicable.

V 0 00 ....... 0 I,emolile o CO 2 M9 5 SiS 022 (OH)2 Fe++ / (Mg + Fe++) ferrol,emolile o CO 2 Fe;+ SiS 022 (OH)2 24 Amphiboles haslmgsite magne siohosl ing site No Co 2Fe:+Fe++-+ Sis Al z 022 (OH}z No CO 2 M9 4 Fe...... 0 o o o 08 o + + +" U. , 1966). ' o + + + +" u. , 1966). , 1966)_ + + 26 Amphiboles variable chemical compositions: (Na,K)o_1(Na,Ca,Mn+2,Mg,Fe+ 2)2(Mg, Fe+ 2,Fe+ 3,Mn+ 2,Ti,Al)5(Si,AI,Fe+ 3)s022(OH,O,F)2' We refer to intermediate members of the tremolite-ferrotremolite series as actinolites, to complex Na-AI calcic amphiboles collectively as hornblendes.

Ordering of cations among octahedral sites in both cummingtonite-grunerite and tremolite-actinolite series (BURNS, 1966; BURNS and STRENS, 1966) means that exchange equilibria involving these amphiboles cannot be explained adequately based on ideal solution theory models. Unpublished work by the present author dealing with coexisting glaucophanes + actinolites reveals somewhat similar relationships to those elucidated by MUELLER (1960, 1962). Analyses were performed using an electron microprobe, so as with MUELLER'S study, distinction between ferrous and ferric iron was not practicable.

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