American Mineralogist

Volume 53, Issue no. 0910 : September - October 1968

REGULAR ARTICLE

1433 Wickenburgite, a new mineral from Arizona

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1439 Structural basis of the olivine-spinel stability

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1456 Order-disorder in MgAl2O4. The systems: MgAl2O4-LiAl5O8, MgAl2O4-NiCr2O4, MgAl2O4-NiAl2O4, and NiAl2O4-ZnAl2O4

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1476 The thermal expansion of the leucite group of minerals

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1490 Physical properties of synthetic lepidolites

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1513 New data on natural phases in the system Ag-Te

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1523 Sphalerite color banding: lack of correlation with iron content, Pine Point, Northwest Territories, Canada

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1543 Chromite grains showing altered borders from the Basal Reef, Witwatersrand System

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1551 High-potassium cryptomelane from Tarapaca Province, Chile

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1558 Perrierite, chevkinite, and allanite in Upper Cenozoic ash beds in the Western United States

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1568 Albite, variety cleavelandite, and the signs of its optic directions

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1579 Authigenic albite from Rhodes

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1603 Differential solution of plagioclase in supercritical water

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1614 Inesite from the Broken Hill lode, New South Wales, Australia

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1635 Hydrothermal epidote formed in the Salton Sea geothermal system, California

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1645 Experimental precipitation and genesis of sepiolite at earth-surface conditions

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1663 Synthetic indium silicate and indium hydrogarnet

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1674 Chemical study of phase equilibria in charnockites, Varberg, Sweden

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1696 The origin of antiperthites from some charnockitic rocks in the New Jersey Precambrian

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1709 Calculated powder patterns: I. Five plagioclases

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1724 A lunar and planetary petrographic microscope

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1738 Inexpensive crystal structure models of framework tetrahedra

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1740 Infrared spectra of phosphate minerals: splitting and frequency shifts associated with substitution of PO43- for AsO43- in mimetite (Pb5(AsO4)3Cl)

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1744 Hydrothermal investigation of GeO2

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1748 Copper zoning in pyrite from Cerro de Pasco, Peru

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1752 Zinc-rich micas from Sterling Hill, New Jersey

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1754 The refractive index of experimentally hydrated rhyolite glass

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1756 Stress-corrosion failure and the hydration of glassy silicic rocks

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1759 Bytownite from Cape Parry, East Greenland

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1765 Improved cold seal pressure vessels to operate to 1100° C at 3 kilobars

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1770 Electron microprobe analysis of vanadium in the presence of titanium

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1773 Preparation of thin film sections

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NEW MINERAL NAMES

1530 New occurrences and data for jalpaite

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1775 New Mineral Names

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MINERALOGICAL NOTES

1735 MINERALOGICAL NOTES: The X-ray spectrographic determination of sulfur coordination in scapolite

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NOTES

1787 Notices

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BOOK REVIEW

1781 Book Reviews

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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.