American Mineralogist, 2005, V 90, N 1, January.

 LETTERS 

  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 

ARTICLES 

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 Gotze, Michael Plotze, 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 

36
The influence of OH in coesite on the kinetics 
of the coesite-quartz phase transition 
Christian Lathe, Monika Koch-Muller, Richard Wirth, 
Wim van Westrenen, Hans-Joachim Mueller, 
Frank Schilling, and Jorn Lauterjung 

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
Mossbauer 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 

115 
Ca2SiO3OHF—A high-pressure phase
with dense calcium polyhedral packing 
and tetrahedral silicon 
Kurt Leinenweber, Jennifer E. Johnson, 
and Thomas L. Groy 

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 (Mn0.54Ca0.03Mg1.43Si2O6)
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 Mossbauer 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 

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 

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

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).