American Mineralogist

Volume 49, Issue no. 0506 : May - June 1964

REGULAR ARTICLE

543 Greigite, the thio-spinel of iron; a new mineral

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556 Occurrence of regularly interstratified chlorite-vermiculite as a weathering product of chlorite in a soil

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573 Phase equilibrium relations in the system CaMgSi2O6(diopside) – NaAlSiO4(nepheline) – NaAlSi3O8(albite) – H2O at 1,000 kg/cm2 water vapor pressure

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586 Glauconites; cation exchange capacities and infrared spectra; Part I, The cation exchange capacity of glauconite

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599 Use of the angle A1^c in optical determination of the composition of augite

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607 Mineral equilibrium studies of the pseudomorphism of pyromorphite by hinsdalite

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614 Optical-crystallographic scatter in plagioclase

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634 Biotite mica effect in x-ray spectrographic analysis of pressed rock powders

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644 Goldmanite, a vanadium garnet from Laguna, New Mexico

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656 Zeolite studies IV: Na-P zeolites and the ion exchanged derivatives of tetragonal Na-P

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683 Immersion liquids of relatively strong dispersion in the low refractive index range (1.46 to 1.52)

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689 Stable mineral assemblages of anhydrous copper and iron oxides

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697 On the cation and water positions in faujasite

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705 Reduction of orientation effects in quantitative x-ray diffraction analysis of kaolin minerals

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715 The alkali feldspars of the Tatoosh pluton in Mount Rainier National Park

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736 Correlations between infrared spectrum and chemical composition of mica

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769 The direct spectrophotometric microdetermination of high-level magnesium in silicate minerals. A Clayton yellow procedure

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781 Additional notes on margarosanite

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782 The thorite-huttonite phase transformation as determined by growth of synthetic thorite and huttonite single crystals

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785 A distinction between natural and synthetic emeralds

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792 “Re-examination of “”struverite””–a further note”

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794 On the origin of anomalous etch pits in minerals

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800 Electropolishing of pyrite

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806 Growth of forsterite crystals in a reactive crucible

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808 On Mertie’s analytic classification and quadriplanar charting of analyses with nine or more components

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812 “Comment on “”Errors in the measurement of 2V with the universal stage,”” by M. Munro”

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813 “Reply to “”Comment on ‘Errors in the measurement of 2V with the universal stage'”””

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NEW MINERAL NAMES

816 New Mineral Names

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MINERALOGICAL NOTES

778 MINERALOGICAL NOTES: Lazurite, talc and chlorite in the Green River formation of Wyoming

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NOTES

805 Note on the revised composition of two olivines from the Skaergaard intrusion, East Greenland

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828 Notices

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BOOK REVIEW

822 Book Reviews

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TABLE OF CONTENTS
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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.