American Mineralogist

Volume 70, Issue no. 0910 : September - October 1985

REGULAR ARTICLE

885 TEM study of a pyroxene-to-pyroxenoid reaction

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902 The alteration of granitic biotite to chlorite

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911 The high-low albite relations revealed by reversal of degree of order at high pressures

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924 The hydrothermal melting of low and high albite

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934 Dissolution of olivine in basaltic liquids: experimental observations and applications

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946 Raman spectra of gallium and germanium substituted silicate glasses: variations in intermediate range order

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961 A single-dissolution technique for determining FeO and Fe2O3 in rock and mineral samples

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969 Two independent refinements of the structure of paracelsian, BaAl2Si2O8

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975 Systematic compositional zoning in the quartz fibers of agates

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980 Hornblende-cummingtonite and hornblende-actinolite intergrowths from the Koyama calc-alkaline intrusion, Susa, southwest Japan

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987 Crystal-chemical implications of the Mg2+-Fe2+ distribution in orthopyroxenes

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996 Magnetic susceptibilities of representative smectites

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1004 Compositional variations of the Unterrupsroth beidellite

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1011 Crystal structure refinement and crystal chemistry of pumpellyite

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1020 MgSiO3 ilmenite: calorimetry, phase equilibria, and decomposition at atmospheric pressure

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1027 Theoretical analysis of chemical and magnetic ordering in the system Fe2O3-FeTiO3

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1036 The crystal chemistry of iron-nickel thiospinels

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1044 Wodginite and associated oxide minerals from the Peerless pegmatite, Pennington County, South Dakota

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1050 The crystal structure of wroewolfeite, a mineral with [Cu4(OH)6(SO4)(H2O)] sheets

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1056 Sb10S15, a Pb-free analogue of fulöppite, Pb3Sb8S15

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1059 “Identity of “”freyalite””, an alleged rare earth-rich variety of thorite, and its pre-metamict composition”

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1065 Thermodynamic studies of zeolites: heulandite

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NOTES

1074 NOTICES

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BOOK REVIEW

1072 BOOK REVIEWS

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TABLE OF CONTENTS
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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.