American Mineralogist

Volume 49, Issue no. 1112 : November - December 1964

REGULAR ARTICLE

1511 Grantsite, a new hydrated sodium calcium vanadate from New Mexico, Colorado, and Utah

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1527 Crystal chemistry of the pyroxenes and pyroxenoids

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1543 Mineralogical studies of kaolinite-halloysite clays: Part II Some Brazilian kaolins

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1549 The crystal structure of tunellite, SrB6O9(OH)2·3H2O

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1569 Exchange equilibria on montmorillonite involving organic cations

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1578 Studies of the torbernite minerals (I) : The crystal structure of abernathyite and the structurally related compounds NH4(UO2AsO4)·3H2O and K(H3O)(UO2AsO4)2·6H2O

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1603 Studies of the torbernite minerals (II): The crystal structure of meta- torbernite

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1622 Extinction and 2V: A simple stereographic solution of general application

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1631 Glauconites: cation exchange capacities and infrared spectra. Part II. Infrared absorption characteristics of glauconites

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1643 Recovery of coesite and stishovite from Coconino Sandstone of Meteor Crater, Arizona

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1648 Selective dissolution of micas from potassium feldspars by sodium pyrosulfate fusion of soils and sediments

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1660 Accessory minerals in some granitic rocks in California and Nevada as a function of calcium content

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1670 Infrared spectra-crystal structure correlations: II. Comparison of simple polymorphic minerals

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1688 The breakdown of potassium feldspar, KAlSi3O8 at high temperatures and high pressures

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1707 Topotaxy in the anatase-rutile transformation

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1718 A quantitative petrographic study of dolerite in the Deep River Basin, North Carolina

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1736 Cenosite from Porthill, Idaho

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1741 Differential thermal analysis in closed systems at high hydrostatic pressures

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1747 Allanite in the Tan-y-Grisiau microgranite, Merionethshire, North Wales

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1752 A simple identification reaction for zeolites (molecular sieves)

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1754 Magnesium vermiculite from the Twin Sisters Mountains, Washington

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1763 Some properties of alunogen from New South Wales

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1766 Fluorite from the Badu pegmatite, Llano County, Texas

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1769 X-ray study of chrysotile

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1771 Growth spirals on prism faces of cultured quartz

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NEW MINERAL NAMES

1774 New Mineral Names

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MINERALOGICAL NOTES

1730 MINERALOGICAL NOTES: Electron probe microanalysis of some carbonate, sulfate and phosphate minerals in the Orgueil meteorite

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NOTES

1782 Notices

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BOOK REVIEW

1779 Book Reviews

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INDEX

1783 Index to Volume 49

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TABLE OF CONTENTS
&
SPECIAL COLLECTIONS

Table of Contents

AmMin submission to acceptance/”first publication” is at a record average of about three to four months. Our acceptance to “final” publication is presently another 13 months on average.

Special Collections

American Mineralogist is an international journal that publishes mineralogical papers of broad interest to the geoscience and materials science community.