ARTICLES

Glen B. Cook and Reid F. Cooper
Iron concentration and the physical processes of dynamic oxidation in an alkaline earth aluminosilicate glass    397
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Roberta Oberti, Riccardo Vannucci, Alberto Zanetti, Massimo Tiepolo, and Richard C. Brumm
A crystal chemical re-evaluation of amphibole/ melt and amphibole/clinopyroxene D_Ti values in petrogenetic studies    407
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Danielle Velde
Mineralogy of mafic xenoliths and their reaction zones in the olivine lamproite from Prairie Creek Arkansas and the paragenesis of haggertyite, Ba[Fe₆Ti₅Mg]O₁₉   420
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Andrew P. Barth and Michael J. Dorais
Magmatic anhydrite in granitic rocks: First occurrence and potential petrologic consequences    430
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Maria Franca Brigatti, Paola Frigieri, Claudio Ghezzo, and Luciano Poppi
Crystal chemistry of Al-rich biotites coexisting with muscovites in peraluminous granites    436
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Günther J. Redhammer, Anton Beran, Julius Schneider, Georg Amthauer, and Werner Lottermoser
Spectroscopic and structural properties of synthetic micas on the annite-siderophyllite binary: Synthesis, crystal structure refinement, Mössbauer, and infrared spectroscopy    449
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Bernard W. Evans, Mark S. Ghiorso, and Scott M. Kuehner
Thermodynamic properties of tremolite: A correction and some comments    466
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E. Huang, C.H. Chen, T. Huang, E.H. Lin, and Ji-an Xu
Raman spectroscopic characteristics of Mg-Fe-Ca pyroxenes    473
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Susan Carpenter Woods, Stephen Mackwell, and Darby Dyar
Hydrogen in diopside: Diffusion profiles    480
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T.C. Labotka, D.R. Cole, and L.R. Riciputi
Diffusion of C and O in calcite at 100 MPa    488
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Liane G. Benning, Richard T. Wilkin, and Hubert L. Barnes
Solubility and stability of zeolites in aqueous solution: II. Calcic clinoptilolite and mordenite    495
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Huifang Xu, David R. Veblen, Peter Buseck, and B.L. Ramakrishna
TEM and SFM of exsolution and twinning in an alkali feldspar    509
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Camilla Haavik, Svein Stølen, Helmer Fjellvåg, Michael Hanfland, and Daniel Häusermann
Equation of state of magnetite and its high-pressure modification: Thermodynamics of the Fe-O system at high pressure    514
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Stephen E. Wright, Jeffrey A. Foley, and John M. Hughes
Optimization of site occupancies in minerals using quadratic programming    524
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Marcello Merli, Luciano Ungaretti, Roberta Oberti
Leverage analysis and structure refinement of minerals    532
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Yong Xu and Martin A.A. Schoonen
The absolute energy positions of conduction and valence bands of selected semiconducting minerals    543
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Stuart A. Hayward, Jaime del Cerro, and Ekhard K.H. Salje
Antiferroelectric phase transition in titanite: Excess entropy and short range order    557
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Thomas Armbruster and Edwin Gnos
P4/n and P4nc long-range ordering in low- temperature vesuvianites    563
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Thomas Armbruster and Edwin Gnos
Tetrahedral vacancies and cation ordering in low-temperature Mn-bearing vesuvianites: Indication of a hydrogarnet-like substitution    570
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Roberta Oberti, José M. Caballero, Luisa Ottolini, Sol López-Andrés, and Victor Herreros
Sodic-ferripedrizite, a new monoclinic amphibole bridging the magnesium-iron-manganese-lithium and the sodium-calcium groups    578
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Athos Callegari, Franca Caucia, Fiorenzo Mazzi, Roberta Oberti, Luisa Ottolini, and Luciano Ungaretti
The crystal structure of peprossiite-(Ce), an anhydrous REE and Al mica-like borate with square-pyramidal coordination for Al    586
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Alexandra Friedrich, Manfred Wildner, Ekkehart Tillmanns, and Peter L. Merz
Crystal chemistry of the new mineral brandholzite, Mg(H₂O)₆[Sb(OH)₆]₂,
and of the synthetic analogues M²⁺(H₂O)₆[Sb(OH) ₆]₂ (M²⁺ = Mg, Co)    593
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LETTERS

Nikolay Zotov and Hans Keppler
In-situ Raman spectra of dissolved silica species in aqueous fluids to 900°C and 14 kbar     600
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Peter C. Burns, Joseph J. Pluth, Joseph V. Smith, Peter Eng, Ian Steele, and Robert M. Housley
Quetzalcoatlite: A new octahedral-tetrahedral structure from a 2 x 2 x 40 mm³ crystal at the Advanced Photon Source-GSE-CARS Facility    604
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Björn Winkler, Victor Milman, Elena V. Akhmatskaya, and Ross H. Nobes
Bonding and dynamics of Mg in pyrope: a theoretical investigation    608
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Tibor Gasparik, Akhilesh Tripathi, and
John B. Parise
Structure of a new Al-rich phase, [K, Na]_0.9[Mg, Fe]₂[Mg, Fe, Al, Si]₆O₁₂, synthesized at 24 GPa    613
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A.R. Pratt and H.W. Nesbitt
Core level electron binding energies of
realgar (As₄S₄)    619
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Alicia R. Elsetinow, Jeffrey M. Guevremont, Daniel R. Strongin, Martin A.A. Schoonen, and Myron Strongin
Oxidation of {100} and {111} surfaces of pyrite: Effects of preparation method    623
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NEW MINERAL NAMES   627

John L. Jambor, Vladimir A. Kovalenker, and Andrew C. Roberts
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BOOK REVIEW    631

Paul Pohwat
Dana's New Mineralogy by Richard V. Gaines, H. Catherine Skinner, Eugene E. Foord, Brian Mason, and Abraham Rosenzweig, John Wiley & Sons, 1997
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ERRATUM    632

M. D. Ruiz Cruz, E. Puga, and J. M. Nieto
Silicate and oxide exsolution in pseudo-spinifex olivine from metaultramafic rocks of the Betic Ophiolitic Association: A TEM study
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