American Mineralogist

Volume 25, Issue no. 07 : July 1940

REGULAR ARTICLE

441 Crystal chemistry of the phosphates, arsenates and vanadates of the type A2XO4(Z)

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480 Age of the uraninite from the McLear pegmatite near Richville Station, St. Lawrence County, New York

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488 Willemite morphology and paragenesis at Balmat, New York

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497 The Bartlett meteorite, Bell County, Texas

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501 New data on the optical properties of tridymite

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502 A mount for the universal stage study of fragile materials

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NEW MINERAL NAMES

504 New mineral names

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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.