Amphiboles: Crystal Chemistry Phase Relations and Occurrence

ISBN-13: 9783642461408 / Angielski / Miękka / 2012 / 126 str.

W. G. Ernst

Opis

This series of monographs represents continuation on an international basis of the previous series MINERALOGIE UNO PETROGRAPHIE IN EINZELOARSTELLUNGEN, published by Springer-Verlag. The voluminous results arising from recent progress in pure and applied re search increase the need for authoritative reviews but the standard scientific journals are unable to provide the space for them. By their very nature, text-books are unable to consider specific topics in depth and recent research met'hods and results often receive only cursory treat ment. Advanced reference volumes are usually too detailed except for experts in the field. It is often very expensive to purchase a symposium volume or an "Advances in . . . " volume for the sake of a specific review chapter surrounded by unrelated chapters. We hope that this monograph series will by-pass these problems in fulfilling the need. The purpose of the series is to publish, at reasonable prices, reviews and reports of care fully selected topics written by carefully selected authors, who are both good writers and experts in their scientific field. In general, the mono graphs will be concerned with the most recent research methods and results. The editors hope that the monographs will serve several functions, acting as supplements to existing text-books, guiding research workers, and providing the basis for advanced seminars. August 1967 W. VON ENGELHARDT, Tiibingen T. HAHN, Aachen R. Roy, University Park, Pa. J. W. WINCHESTER, Ann Arbor, Mich. P. J. WYLLIE, Chicago, Ill."

Spis treści

I. Introduction and Acknowledgments.- II. Crystal Chemistry of the Amphiboles.- Historical Review.- General Considerations.- Site Occupancy.- Ionic Substitutions and Lattice Effects.- Unit Cell Dimensions of Synthetic Amphiboles.- Observed b-Axis Variation and M2 Occupancy of Natural Monoclinic Amphiboles.- III. Compositional Variations of the Amphiboles.- Classification.- Iron-Magnesium Amphiboles.- Calcic Amphiboles.- Sodic Amphiboles.- Amphibole Miscibility Gaps.- IV. Hydrothermal Phase Equilibration and Natural Stability.- Experimental Techniques.- Demonstration of Experimental Equilibria.- Contrasts in Natural and Synthetic Conditions.- V. Experimental Phase Relations and Occurrence of the Iron-Magnesium Amphiboles.- Anthophyllites, ?(Mg,Fe+2)7Si8O22(OH)2.- Gedrites, ?(Mg,Fe+2)5Al2Si6Al2O22(OH)2.- Cummingtonite-Grunerite, ?(Mg,Fe+2)7Si8O22 (OH)2.- Natural Occurrences of the Iron-Magnesium Amphiboles.- VI. Experimental Phase Relations and Occurrence of the Calcic Amphiboles.- Tremolite, ?Ca2Mg5Si8O22(OH)2.- Ferrotremolite, ?Ca2Fe5+2Si8O22COH)2.- Actinolites, ?Ca2(Mg,Fe+2)5Si8O22(OH)2.- Pargasite, NaCa2Mg4AlSi6Al2O22(OH)2.- Ferropargasite, NaCa2Fe4+2AlSi6Al2O22(OH)2..- Other Calcic Amphiboles.- Natural Occurrences of the Calcic Amphiboles.- Amphiboles in the Mantle.- VII. Experimental Phase Relations and Occurrence of the Sodic Amphiboles.- Glaucophane, ?Na2Mg3Al2Si8O22(OH)2.- Magnesioriebeckite, ?Na2Mg3Fe2+3Si8O22(OH)2.- Riebeckite and Riebeckite-Arfvedsonite Solid Solutions, ?Na2Fe3+2Fe2+3Si8O22(OH)2?Na2.4? Fe4.9+2Fe0.7+3Si7.7Fe0.3+3O22(OH)2.- Ferroglaucophane, ?Na2Fe3+2Al2Si8O22(OH)2.- Polymorphism in Sodic Amphiboles.- Richterite, Na2CaMg5Si8O22(OH)2, and Eckermannite, Na3Mg4AlSi8O22(OH)2.- “Magnesiorichterte,” Na2Mg6Si8O22(OH)2, and “Fluormagnesiorichterite,” Na2Mg6Si8? O22F2.- Natural Occurrences of the Sodic Amphiboles.- VIII. Concluding Statement.- Comparison of Experimental P-T Curves.- Final Remarks.- References.- Author Index.