American Mineralogist
REGULAR ARTICLE
181 Pegmatite phosphates and their problems
208 An andradite-spessartite garnet from Pajsberg, Sweden
216 Mg-vermiculite: a refinement and re-examination of the crystal structure of the 14.36 Å phase
228 Crystal and twin structure of digenite, Cu9S5
243 X-ray studies of synthetic coffinite, thorite and uranothorites
249 Piezobirefringence in silicon
263 Twinning in diamond-type structures: A proposed boundary-structure model
285 Production of graphite single crystals by thermal decomposition of aluminum carbide
336 Acceptance of the Roebling Medal of the Mineralogical Society of America
346 Acceptance of the 1957 MSA Award
368 A simple fusion method for determination of. plagioclase feldspar from thin section
370 A double arc goniometer head for crystal orientation, sawing and grinding
388 Fellows and members of the Mineralogical Society of America
AWARD
334 Presentation of the Roebling Medal to Walter F. Hunt
344 Presentation of the Mineralogical Society of America Award to Rustum Roy
NEW MINERAL NAMES
378 New Mineral Names
NOTES and NEWS
367 Notes and News: Formation and properties of synthetic thorite crystals
BOOK REVIEW
376 Book Reviews
PROCEEDINGS
349 Proceedings of the thirty-eighth annual meeting of the Mineralogical Society of America at Atlantic City, New Jersey
MEMORIAL
297 Memorial of George Davis Louderback
302 Memorial of Arthur Leonard Parsons
307 Memorial of John Charles Rabbitt
310 Memorial of Austin Flint Rogers
317 Memorial of Samuel James Shand
325 Memorial of Frantiek Slavîk
331 Memorial of Benno Wasserstein
TABLE OF CONTENTS
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SPECIAL COLLECTIONS
Table of Contents
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American Mineralogist is an international journal that publishes mineralogical papers of broad interest to the geoscience and materials science community.