American Mineralogist
REGULAR ARTICLE
519 Complete substitution of aluminum for silicon: The system 3MnO – Al2O3 – 3SiO2 – 3Y2O3 – 5Al2O3
534 Nasonite and its relation to pyromorphite
538 Isomorphism and bond type
543 Computation of the optical angle from the three principal refractive indices
557 X-ray examination of uranothorite
563 Differential thermal analyses of davidite
573 Perovskite
581 Observations on twinning of plagioclase in metamorphic rocks
590 Taylorite, mascagnite, aphthitalite, lecontite, and oxammite from guano
603 A restudy of the Social Circle, Georgia, meteorite
609 Ilsemannite and jordisite
615 The differential thermal analyzer as a micro-calorimeter
625 Microseparation of minerals in heavy liquids
626 Direct determination of interplanar spacing from x-ray patterns on recorded charts
629 Vivianite concretions in Aquia Formation (Middle Eocene), Anne Arundel County, Maryland
630 Ten years of new mineral names
630 The greenockite locality at Bishopton, Scotland
NEW MINERAL NAMES
638 New mineral names
NOTES
624 Notes on the nomenclature of textural terms in petrography
NOTES and NEWS
622 Notes and News: Determination of thin-section thickness by the U-stage
BOOK REVIEW
633 Book reviews
PROCEEDINGS
635 Mineralogical Society (London)
TABLE OF CONTENTS
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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.