American Mineralogist

Volume 76, Issue no. 0708 : July - August 1991

LETTER

1442 LETTERS Imaging molecular-scale structure and microtopography of hematite with the atomic force microscope

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REGULAR ARTICLE

1081 ARTICLES Physics of aqueous phase evolution in plutonic environments

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1092 Lubrication, gasketing, and precision in multianvil experiments

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1101 Single crystal Raman spectra of forsterite, fayalite, and monticellite

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1110 Mechanisms and kinetics of Al-Si ordering in anorthite: I. Incommensurate structure and domain coarsening

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1120 Mechanisms and kinetics of Al-Si ordering in anorthite: II. Energetics and a Ginzburg-Landau rate law

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1134 Tetrahedrally coordinated Ti4+ in synthetic Ti-rich potassic richterite: Evidence from XRD, FTIR, and Raman studies

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1141 Crystal chemistry of clinopyroxenes from mantle eclogites: A study of the key role of the M2 site population by means of crystal-structure refinement

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1153 The hydrous components in garnets: Grossular-hydrogrossular

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1165 Rare-earth-element ordering and structural variations in natural rare-earth-bearing apatites

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1174 Effect of Ti substitution in biotite-1M crystal chemistry

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1184 Pervasive exsolution within the calcic amphibole series: TEM evidence for a miscibility gap between actinolite and hornblende in natural samples

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1205 On oriented titanite and rutile inclusions in sagenitic biotite

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1218 Ultrafine particles of North Sea iliite/smectite clay minerals investigated by STM and AFM

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1223 Ternary excess properties of grossular-pyrope-almandine garnet and their influence in geothermobarometry

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1232 Thermodynamics of multicomponent olivines and the solution properties of (Ni,Mg,Fe)2SiO4 and (Ca,Mg,Fe)2SiO4 olivines

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1249 Characterization and thermodynamic properties of andradite, Ca3Fe2Si3O12

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1261 Eruptive pegmatite magma: Rhyolite of the Honeycomb Hills, Utah

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1279 Ascent of felsic magmas and formation of rapakivi

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1291 The role of quartz crystallization in the development and preservation of igneous texture in granitic rocks: Experimental evidence at 1 kbar

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1306 Mineralogy and geochemistry of Eocene intrusive rocks and their enclaves, El Paso area, Texas and New Mexico

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1319 Oscillatory zonation patterns in hydrothermal grossular-andradite garnet: Nonlinear dynamics in regions of immiscibility

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1328 Al zoning in pyroxene and plagioclase: Window on late prograde to early retrograde P-T paths in granulite terranes

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1344 Evidence for postentrapment diffusion of hydrogen into peak metamorphic fluid inclusions from the massive sulfide deposits at Ducktown, Tennessee

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1356 Euhedral awaruite in the Allende meteorite: Implications for the origin of awaruite- and magnetite-bearing nodules in CV3 chondrites

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1363 Nickel-copper sulfides from the 1959 eruption of Kilauea Volcano, Hawaii: Contrasting compositions and phase relations in eruption pumice and Kilauea Iki lava lake

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1373 Relationship between composition and d001 for chlorite

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1380 Crystal chemistry of Fe- and Cr-rich warwickite

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1389 The kentrolite-melanotekite series, 4Pb2(Mn,Fe)3+2O2[Si2O7]: Chemical crystallographic relations, lone-pair splitting, and cation relation to 8URe2

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1400 The crystal structure of lüneburgite, Mg3(H2O)6[B2(OH)6(PO4)2]

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1408 The remarkable långbanite structure type: Crystal structure, chemical crystallography, and relation to some other cation close-packed structures

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1426 New characterization of takanelite

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1431 A unique manganese-rich silicic edenite in the Grenville marble, Fowler, New York

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1446 Mechanisms of Ar release from Himalayan metamorphic hornblende

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NEW MINERAL NAMES

1434 NEW MINERAL NAMES

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BOOK REVIEW

1441 BOOK REVIEW

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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.