American Mineralogist - April 2009 Table of Contents

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Vol. 94, no. 4

An International Journal of Earth and Planetary Materials

April 2009

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LETTERS

622 Determination of the crystal structure of sanderite, MgSO₄·2H₂O, by X-ray powder diffraction and the charge flipping method
Hongwei Ma, David L. Bish, Hsiu-Wen Wang, and Steve J. Chipera
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626 Forsterite, wadsleyite, and ringwoodite (Mg₂SiO₄): ²⁹Si NMR constraints on structural disorder and effects of paramagnetic impurity ions
Jonathan F. Stebbins, Wendy R. Panero, Joseph R. Smyth, and Daniel J. Frost
Abstract
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630 Crystal structure and Raman spectrum of a high-pressure Li-rich majoritic garnet, (Li₂Mg)Si₂(SiO₄)₃
Hexiong Yang, Jürgen Konzett, Robert T. Downs, and Daniel J. Frost
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634 Quasi-ice-like C_P behavior of molecular H₂O in hemimorphite Zn₄Si₂O₇(OH)₂·H₂O: C_P and entropy of confined H₂O in microporous silicates
Charles A. Geiger and Edgar Dachs
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ARTICLES

409 Acid production by FeSO₄·nH₂O dissolution and implications for terrestrial and martian aquatic systems
Joel A. Hurowitz, Nicholas J. Tosca, and M. Darby Dyar
Abstract
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415 Growth controls in colloform pyrite
Craig D. Barrie, Adrian J. Boyce, Alan P. Boyle, Patrick J. Williams, Kevin Blake, Takahiko Ogawara, Junji Akai, and David J. Prior
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430 Parageneses and Th-U distributions among allanite, monazite, and xenotime in Barrovian-type metapelites, Imjingang belt, central Korea
Yoonsup Kim, Keewook Yi, and Moonsup Cho
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439

Magmatic vs. hydrothermal origins for zircon associated with tantalum mineralization in the Tanco pegmatite, Manitoba, Canada
Marieke Van Lichtervelde, Frank Melcher, and Richard Wirth
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451

Molecular conformation and anion configuration variations for As₄S₄ and As₄Se₄ in an anion-substituted solid solution
Atsushi Kyono
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461

Low-pressure clino- to high-pressure clinoenstatite phase transition: A phonon-related mechanism
Yonggang G. Yu and Renata M. Wentzcovitch
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467

Coordination study of rare earth elements on Fe oxyhydroxide and Mn dioxides: Part I. Influence of a multi-electron excitation on EXAFS analyses of La, Pr, Nd, and Sm
Atsuyuki Ohta, Hiroyuki Kagi, Masaharu Nomura, Hiroshi Tsuno, and Iwao Kawabe
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476

Coordination study of rare earth elements on Fe oxyhydroxide and Mn dioxides: Part II. Correspondence of structural change to irregular variations of partitioning coefficients and tetrad effect variations appearing in interatomic distances
Atsuyuki Ohta, Hiroyuki Kagi, Masaharu Nomura, Hiroshi Tsuno, and Iwao Kawabe
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487

Aluminocerite-Ce: A new species from Baveno,Italy: Description and crystal-structure determination
Fabrizio Nestola, Alessandro Guastoni, Fernando Cámara, Luciano Secco, Alberto Dal Negro, Danilo Pedron, and Anton Beran
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494

A thermodynamic model for the plagioclase-liquid hygrometer/thermometer
Rebecca A. Lange, Holli M. Frey, and Jacob Hector
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(contents continued on outside back cover)

AMMIAY 94(04)409–656 ISSN 0003-004X (print) ISSN 1945-3027 (Online)

(contents continued from front cover)

507

Solid-state NMR and IR spectroscopic investigation of the role of structural water and F in carbonate-rich fluorapatite
Harris E. Mason, Francis M. McCubbin, Alexander Smirnov, and Brian L. Phillips
Abstract
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517

Chemical-structural modularity in the tetradymite group: A HRTEM study
Cristiana Liana Ciobanu, Allan Pring, Nigel John Cook, Peter Self, David Jefferson, Gabriel Ionel Dima, and Volodymir Melnikov
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535

Stability of pargasite during ultrahigh-temperature metamorphism: A consequence of titanium and REE partitioning?
K. Sajeev, Y. Osanai, Y. Kon, and T. Itaya
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547

Raman spectroscopic and microscopic criteria for the distinction of microdiamonds in ultrahigh-pressure metamorphic rocks from diamonds in sample preparation materials
Maria Perraki, Andrey V. Korsakov, David C. Smith, and Evripidis Mposkos
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557

Lattice compression and structural behavior of NaVSi₂O₆ clinopyroxene to 11 GPa
Angela Ullrich, Ronald Miletich, Fabrizio Nestola, Christian Weikusat, and Haruo Ohashi
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565

A predictive model for the enthalpies of hydration of zeolites
Philippe Vieillard and Romain Mathieu
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578

Thermal decomposition of calcite: Mechanisms of formation and textural evolution of CaO nanocrystals
Carlos Rodriguez-Navarro, Encarnacion Ruiz-Agudo, Ana Luque, Alejandro B. Rodriguez-Navarro, and Miguel Ortega-Huertas
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594

Synchrotron Mössbauer spectroscopic study of ferropericlase at high pressures and temperatures
Jung-Fu Lin, Alexander G. Gavriliuk, Wolfgang Sturhahn, Steven D. Jacobsen, Jiyong Zhao, Michael Lerche, and Michael Hu
Abstract
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600

Effective radii of noble gas atoms in silicates from first-principles molecular simulation
Liqun Zhang, James A. Van Orman, and Daniel J. Lacks
Abstract
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609

Fettelite, [Ag₆As₂S₇][Ag₁₀HgAs₂S₈] from Chañarcillo, Chile: Crystal structure, pseudosymmetry, twinning, and revised chemical formula
Luca Bindi, Frank N. Keutsch, Carl A. Francis, and Silvio Menchetti
Abstract
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616

High-pressure phase transformation in LiFeGe₂O₆ pyroxene
Fabrizio Nestola, Günther J. Redhammer, Martha G. Pamato, Luciano Secco, and Alberto Dal Negro
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PRESENTATION OF AWARDS FOR 2008

638 Presentation of the Roebling Medal for 2008 of Mineralogical Society of America to Bernard W. Evans
Donna L. Whitney
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639 Acceptance of the Mineralogical Society of America Roebling Medal for 2008
Bernard W. Evans
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641 Presentation of the Mineralogical Society of America Award for 2008
Ho-kwang “David” Mao
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643 Acceptance of the Mineralogical Society of America Award for 2008
James Badro
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644 Presentation of the Mineralogical Society of America Dana Medal for 2008 to Thomas Armbruster
Martin Kunz
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646 Acceptance of the Dana medal of the Mineralogical Society of America for 2008
Thomas Armbruster
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648 NEW MINERAL NAMES
Paula C. Piilonen, Glenn Poirier, and Kimberly T. Tait
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653 REVIEWERS 2008
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655 BOOK REVIEW
Bruce Yardley
FLUID-FLUID INTERACTIONS. Axel Liebscher and Christoph A. Heinrich, Eds. (2007) Reviews in Mineralogy and Geochemistry, 65, 430 p. Mineralogical Society of America, Chantilly, Virginia. ISBN 978-0-939950-77-5.
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