American Mineralogist
REGULAR ARTICLE
1511 Grantsite, a new hydrated sodium calcium vanadate from New Mexico, Colorado, and Utah
1527 Crystal chemistry of the pyroxenes and pyroxenoids
1543 Mineralogical studies of kaolinite-halloysite clays: Part II Some Brazilian kaolins
1549 The crystal structure of tunellite, SrB6O9(OH)2·3H2O
1569 Exchange equilibria on montmorillonite involving organic cations
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
1603 Studies of the torbernite minerals (II): The crystal structure of meta- torbernite
1622 Extinction and 2V: A simple stereographic solution of general application
1631 Glauconites: cation exchange capacities and infrared spectra. Part II. Infrared absorption characteristics of glauconites
1643 Recovery of coesite and stishovite from Coconino Sandstone of Meteor Crater, Arizona
1648 Selective dissolution of micas from potassium feldspars by sodium pyrosulfate fusion of soils and sediments
1660 Accessory minerals in some granitic rocks in California and Nevada as a function of calcium content
1670 Infrared spectra-crystal structure correlations: II. Comparison of simple polymorphic minerals
1688 The breakdown of potassium feldspar, KAlSi3O8 at high temperatures and high pressures
1707 Topotaxy in the anatase-rutile transformation
1718 A quantitative petrographic study of dolerite in the Deep River Basin, North Carolina
1736 Cenosite from Porthill, Idaho
1741 Differential thermal analysis in closed systems at high hydrostatic pressures
1747 Allanite in the Tan-y-Grisiau microgranite, Merionethshire, North Wales
1752 A simple identification reaction for zeolites (molecular sieves)
1754 Magnesium vermiculite from the Twin Sisters Mountains, Washington
1763 Some properties of alunogen from New South Wales
1766 Fluorite from the Badu pegmatite, Llano County, Texas
1769 X-ray study of chrysotile
1771 Growth spirals on prism faces of cultured quartz
NEW MINERAL NAMES
1774 New Mineral Names
MINERALOGICAL NOTES
1730 MINERALOGICAL NOTES: Electron probe microanalysis of some carbonate, sulfate and phosphate minerals in the Orgueil meteorite
NOTES
1782 Notices
BOOK REVIEW
1779 Book Reviews
INDEX
1783 Index to Volume 49
TABLE OF CONTENTS
&
SPECIAL COLLECTIONS
Table of Contents
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Special Collections
American Mineralogist is an international journal that publishes mineralogical papers of broad interest to the geoscience and materials science community.