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

By W. G. Ernst

ISBN-10: 3642461387

ISBN-13: 9783642461385

ISBN-10: 3642461409

ISBN-13: 9783642461408

This sequence of monographs represents continuation on a world foundation of the former sequence MINERALOGIE UNO PETROGRAPHIE IN EINZELOARSTELLUNGEN, released via Springer-Verlag. The voluminous effects bobbing up from fresh growth in natural and utilized re­ seek bring up the necessity for authoritative experiences however the commonplace clinical journals are not able to supply the gap for them. by way of their very nature, text-books are not able to contemplate particular themes extensive and up to date study met'hods and effects frequently obtain in simple terms cursory deal with­ ment. complex reference volumes are typically too unique aside from specialists within the box. it's always very pricey to buy a symposium quantity or an "Advances in . . . " quantity for the sake of a particular assessment bankruptcy surrounded through unrelated chapters. we are hoping that this monograph sequence will by-pass those difficulties in enjoyable the necessity. the aim of the sequence is to put up, at average costs, reports and stories of care­ totally chosen themes written by way of rigorously chosen authors, who're either strong writers and specialists of their medical box. often, the mono­ graphs may be fascinated about the latest learn equipment and effects. The editors wish that the monographs will serve numerous features, performing as vitamins to latest text-books, guiding learn staff, and delivering the root for complex seminars. August 1967 W. VON ENGELHARDT, Tiibingen T. HAHN, Aachen R. Roy, collage Park, Pa. J. W. WINCHESTER, Ann Arbor, Mich. P. J. WYLLIE, Chicago, Ill.

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Additional resources for Amphiboles: Crystal Chemistry Phase Relations and Occurrence

Sample text

Ferrotremolite is stable only at remarkably low temperatures and under strongly reducing conditions. With oxygen fugacity defined by the magnetite-iron buffer, the thermal stability limit of ferrotremolite lies at 465 0 C at 1000 bars Pfluid, as shown in Fig. 28. The high temperature assemblage of equivalent bulk composition consists of the phases fayalite quartz hedenbergitic pyroxene fluid. At somewhat higher oxidation states with foz defined by magnetite quartz - fayalite buffer (Fig. 29), magnetite joins the high temperature assemblage.

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.

Field boundaries are dashed where calculated or inferred. Field boundaries (1), (4) and (8) coincide with buffer curves of the same numbers shown in Fig. 17.

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


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