American Mineralogist

Volume 44, Issue no. 1112 : November - December 1959

REGULAR ARTICLE

1105 Yavapaiite, an anhydrous potassium ferric sulfate from Jerome, Arizona

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1115 Silicate garnet—yttrium-iron garnet solid solutions

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1121 Thermoluminescence of rocks and minerals. Part I. An apparatus for quantitative measurement

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1141 Studies of borate minerals. (VI); Investigation of Veatchite

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1150 Studies of borate minerals. (VII); X-ray studies of Ammonioborite, larderellite and the Potassium and ammonium pentaborate tetrahydrates

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1159 Petrography of some erratics from Cape Royds, Ross Island, Antarctica

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1169 The alkali feldspars; V. The nature of orthoclase and microcline perthites and observations concerning the polymorphism of potassium feldspar

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1187 The alkali feldspars; VI, Sanidine and orthoclase perthites from the Slieve Gullion area, Northern Ireland

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1210 New wurtzite polytypes from Joplin, Missouri

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1219 Effect of heat on an organo-montmorillonite complex

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1230 Inorganic-organic cation exchange on montmorillonite

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1237 An interlayer complex of halloysite with ammonium chloride4Cl

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1248 Umohoite from Cameron, Arizona

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1261 Manganian andalusite from Kiawa Mountain, Rio Arriba county, New Mexico

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1272 Use of the spindle stage for determining refractive indices of crystal fragments

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1298 An occurrence of pseudomalachite at Safford, Arizona

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1301 On the stability and synthesis of uvarovite, Ca3Cr2Si3O12

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1303 Detection of zoning in orthorhombic and uniaxial colorless minerals

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1306 Low magnification thin-section photography

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1307 Magnetic susceptibility of rutile, anatase and brookite

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1309 Native selenium from Grants, New Mexico

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1311 Simple technique for the construction of polyhedral structure models

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1314 WuIfenite and cerussite at Bethel, Connecticut

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1314 Determination of mixed layering in glauconites by index of refraction

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NEW MINERAL NAMES

1321 New Mineral Names

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NOTES and NEWS

1294 Notes and News: An occurrence of genthelvite in the Younger Granite Province of Northern Nigeria

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1319 Notes and News

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INDEX

1330 Index to Volume 44;

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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.