36

The influence of OH in coesite on the kinetics of the coesite-quartz phase transition
Christian Lathe, Monika Koch-Müller, Richard Wirth, Wim van Westrenen, Hans-Joachim Mueller, Frank Schilling, and Jörn Lauterjung

115

Ca₂SiO₃OHF—A high-pressure phase with dense calcium polyhedral packing and tetrahedral silicon
Kurt Leinenweber, Jennifer E. Johnson, and Thomas L. Groy

219

Cation ordering in magnesioferrite, MgFe₂O₄, to 982 °C using in situ synchrotron X-ray powder diffraction
Sytle M. Antao, Ishmael Hassan, and John B. Parise

252

Pressure-induced stabilization of ordered paranatrolite: A new insight into the paranatrolite controversy
Yongjae Lee, Joseph A. Hriljac, John B. Parise, and Thomas Vogt

258

The effect of zinc sulfide on phase transformations of ferrihydrite
Mitch Loan, Gordon M. Parkinson, and William R. Richmond

262

Stability and equation of state of MgGeO₃ post-perovskite phase
Kei Hirose, Katsuyuki Kawamura, Yasuo Ohishi, Shigehiko Tateno, and Nagayoshi Sata

266

Pressure dependence of the OH-stretching mode in F-rich natural topaz and topaz-OH
K. Komatsu, H. Kagi, T. Okada, T. Kuribayashi, J. B. Parise, and Y. Kudoh

1

Contact metamorphism of the White Mountain Peak metavolcanic complex, eastern California
W.G. Ernst

13

Structure and luminescence characteristics of quartz from pegmatites
Jens Götze, Michael Plötze, and Toralf Trautmann

22

Evidence for monazite-, barite-, and AgMnO₄ (distorted barite)-type structures of CaSO₄ at high pressure and temperature
Wilson A. Crichton, John B. Parise, Sytle M. Antao, and Andrzej Grzechnik

28

The template effect of the extra-framework content on zeolite compression: The case of yugawaralite
Ettore Fois, Aldo Gamba, Gloria Tabacchi, Rossella Arletti, Simona Quartieri, and Giovanna Vezzalini

44

First-principles study of hydrogen bond symmetrization of phase D under high pressure
Jun Tsuchiya, Taku Tsuchiya, and Shinji Tsuneyuki

50

First-principles study of OH-stretching modes in kaolinite, dickite, and nacrite
Etienne Balan, Michele Lazzeri, A. Marco Saitta, Thierry Allard, Yves Fuchs, and Francesco Mauri

61

A systematic study of OH in hydrous wadsleyite from polarized FTIR spectroscopy and single-crystal X-ray diffraction: Oxygen sites for hydrogen storage in Earth’s interior
Steven D. Jacobsen, Sylvie Demouchy, Daniel J. Frost, Tiziana Boffa Ballaran, and Jennifer Kung

71

Determination of the content and distribution of fixed ammonium in illite-smectite using a modified X-ray diffraction technique: Application to oil source rocks of western Greenland
Victor A. Drits, Boris A. Sakharov, Alfred L. Salyn, and Holger Lindgreen

85

Determination of defect structures in kaolin minerals by high-resolution transmission electron microscopy (HRTEM)
Toshihiro Kogure and Atsuyuki Inoue

90

M??ssbauer spectroscopy of omphacite and garnet pairs from eclogites: Application to geothermobarometry
Yi-Liang Li, Yong-Fei Zheng, and Bin Fu

101

Allanite and epidote weathering at the Coweeta Hydrologic Laboratory, western North Carolina, U.S.A.
Jason R. Price, Michael A. Velbel, and Lina C. Patino

122

Relationships between SEM-cathodoluminescence response and trace-element composition of hydrothermal vein quartz
Marianne R. Landtwing and Thomas Pettke

132

Quantitative evaluation of attenuation contrast of X-ray computed tomography images using monochromatized beams
Akira Tsuchiyama, Kentaro Uesugi, Tsukasa Nakano, and Susumu Ikeda

143

Biotic and abiotic products of Mn(II) oxidation by spores of the marine Bacillus sp. strain SG-1
John R. Bargar, Bradley M. Tebo, Uwe Bergmann, Samuel M. Webb, Pieter Glatzel, Van Q. Chiu, and Mario Villalobos

155

The Mn, Mg-intracrystalline exchange reaction in donpeacorite (Mn_0.54Ca_0.03Mg_1.43Si₂O₆) and its relation to the fractionation behavior of Mn in Fe, Mg-orthopyroxene
Marilena Stimpfl

162

Crystal structures of chalcostibite (CuSbS₂) and emplectite (CuBiS₂): Structural relationship of stereochemical activity between chalcostibite and emplectite
Atsushi Kyono and Mitsuyoshi Kimata

166

Hydration and swelling of synthetic Na-saponites: Influence of layer charge
Laurent J. Michot, Isabelle Bihannic, Manuel Pelletier, Emmanuel Rinnert, and Jean-Louis Robert

173

Dehydroxylation and CO₂ incorporation in annealed mica (sericite): An infrared spectroscopic study
Ming Zhang, Ling Wang, Shigeto Hirai, Simon A.T. Redfern, and Ekhard K.H. Salje

181

Relict coesite exsolution in omphacite from Western Tianshan eclogites, China
Lifei Zhang, Shuguang Song, Juhn G. Liou, Yongliang Ai, and Xuping Li

187

Hyperfine electric field gradients and local distortion environments of octahedrally coordinated Fe²⁺
R. James Evans, Denis G. Rancourt, and Michael Grodzicki

199

A synchrotron M??ssbauer spectroscopy study of (Mg,Fe)SiO₃ perovskite up to 120 GPa
Jennifer M. Jackson, Wolfgang Sturhahn, Guoyin Shen, Jiyong Zhao, Michael Y. Hu, Daniel Errandonea, Jay D. Bass, and Yingwei Fei

206

Temporal stability and pressure calibration of barium carbonate and talc/pyrex pressure media in a piston-cylinder apparatus
John Longhi

229

Halite-sylvite thermoconsolution
David Walker, Pramod K. Verma, Lachlan M.D. Cranswick, Simon M. Clark, Raymond L. Jones, and Stephan Buhre

240

The role of water in the structures of synthetic hallimondite, Pb₂[(UO₂)(AsO₄)₂](H₂O)_n and synthetic parsonsite, Pb₂[(UO₂)(PO₄)₂](H₂O)_n, 0 < n < 0.5
Andrew J. Locock, Peter C. Burns, and Theodore M. Flynn

247

Variable-temperature structural studies of tetranatrolite from Mt. Saint-Hilaire: Synchrotron X-ray powder diffraction and Rietveld analysis
Yongjae Lee, Joseph A. Hriljac, and Thomas Vogt

271

NEW MINERAL NAMES
John L. Jambor, and Andrew C. Roberts

276

BOOK REVIEW: INTRODUCTION TO ORE-FORMING PROCESSES, Laurence Robb, Blackwell Science Ltd., Malden, MA, 2004,373 p.
Brian J. Skinner

276

ERRATUM: New clinopyroxene-liquid thermobarometers for mafic, evolved, and volatile-bearing lava compositions, with applications to lavas from Tibet and the Snake River Plain, Idaho by K.D. Purika, H. Mikaelian, F. Ryerson, and H. Shaw (2003, vol. 88, p. 1542-1554).