607

Electron-microprobe dating as a tool for determining the closure of Th-U-Pb systems in migmatitic monazites
Alain Cocherie, Eugène be Mezeme, Olivier Legendre, C. Mark Fanning, Michel Faure, and Philippe Rossi

653

Crystal chemistry of the hydrothermally synthesized Na₂(Mn_1-xFe²⁺_x)₂Fe³⁺(PO₄)₃ alluaudite-type solid solution
Frédéric Hatert, Leila Rebbouh, Raphaël P. Hermann, André-Mathieu Fransolet, Gary J. Long, and Fernande Grandjean

672

Direct formation of the γ-CaSO₄ phase in dehydration process of gypsum: In situ FTIR study
P.S.R. Prasad, V. Krishna Chaitanya, K. Shiva Prasad, and D. Narayana Rao

695

Low-T neutron powder-diffraction and synchrotron-radiation IR study of synthetic amphibole Na(NaMg)Mg₅Si₈O₂₂(OH)₂
G. Iezzi, G.D. Gatta, W. Kockelmann, G. Della Ventura, R. Rinaldi, W. Schäfer, M. Piccinini, and F. Gaillard

708

Piston-cylinder experiments on H₂O undersaturated Fe-bearing systems: An experimental setup approaching
Ralf Kägi, Othmar Müntener, Peter Ulmer, and Luisa Ottolini

732

Clinoholmquistite discredited: The new amphibole end-member fluoro-sodic-pedrizite
Roberta Oberti, Fernando Cámara, and Luisa Ottolini

745

Growth zoning and strain patterns inside diamond crystals as revealed by Raman maps
Lutz Nasdala, Wolfgang Hofmeister, Jeffrey W. Harris, and Jürgen Glinnemann

755

Crystal structure of single-crystal CaGeO₃ tetragonal garnet synthesized at 3 GPa and 1000 °C
Akihiko Nakatsuka, Hiroki Chaya, and Akira Yoshiasa

749

Differentiation of commercial vermiculite based on statistical analysis of bulk chemical data: Fingerprinting vermiculite from Libby, Montana U.S.A.
Mickey E. Gunter, Eron Singleton, Bryan R. Bandli, Heather A. Lowers, and Gregory P. Meeker

758

Iron isotope exchange kinetics at the nanoparticulate ferrihydrite surface
Rebecca L. Poulson, Clark M. Johnson, and Brian L. Beard

764

Cation distribution in MgFe₂O₄ vs. pressure and temperature: Experiments in a piston-cylinder apparatus
Alexander I. Turkin and Valeri A. Drebushchak

525

Preface to collected papers on monazite microprobe geochronology
Michael L. Williams and Robert J. Tracy

526

Analytical perils (and progress) in electron microprobe trace element analysis applied to geochronology: Background acquisition, interferences, and beam irradiation effects
Michael J. Jercinovic and Michael L. Williams

547

Contributions to precision and accuracy of monazite microprobe ages
Joseph M. Pyle, Frank S. Spear, David A. Wark, Christopher G. Daniel, and Lara C. Storm

578

Electron-microprobe age mapping of monazite
Philippe Goncalves, Michael L. Williams, and Michael J. Jercinovic

586

Isotopic age constraints from electron microprobe U-Th-Pb dates, using a three-dimensional concordia diagram
Yvette D. Kuiper

592

Monazite ages in the Chesham Pond Nappe, SW New Hampshire, U.S.A.: Implications for assembly of central New England thrust sheets
Joseph M. Pyle, Frank S. Spear, John T. Cheney, and Graham Layne

619

Comparative isotopic and chemical geochronometry of monazite, with implications for U-Th-Pb dating by electron microprobe: An example from metamorphic rocks of the eastern Wyoming craton (U.S.A.)
Peter S. Dahl, Michael A. Hamilton, Michael J. Jercinovic, Michael P. Terry, Michael L. Williams, and Robert Frei

639

Re-examination of the hydrogarnet structure at high pressure using neutron powder diffraction and infrared spectroscopy
George A. Lager, William G. Marshall, Zhenxian Liu, and Robert T. Downs

645

Anomalous elastic behavior and high-pressure structural evolution of zeolite levyne
Giacomo Diego Gatta, Paola Comodi, Pier Francesco Zanazzi, and Tiziana Boffa Ballaran

663

Thermodynamic properties of uvarovite garnet (Ca₃Cr₂Si₃O₁₂)
S. Klemme, J.C. van Miltenburg, P. Javorsky, and F. Wastin

667

Post-aragonite phase transformation in CaCO₃ at 40 GPa
Shigeaki Ono, Takumi Kikegawa, Yasuo Ohishi, and Jun Tsuchiya

679

The order-disorder character of FeOHSO₄ obtained from the thermal decomposition of metahohmannite, Fe³⁺₂(H₂O)₄[O(SO₄)₂]
Gennaro Ventruti, Fernando Scordari, Emanuela Schingaro, Alessandro F. Gualtieri, and Carlo Meneghini

687

Temperature and composition dependence of structural phase transitions in Ca(Ti_xZr_1-x)OGeO₄
Rikke Ellemann-Olesen and Thomas Malcherek

701

Charge contrast imaging of fine-scale microstructure and compositional variation in garnet using the environmental scanning electron microscope
Simon J. Cuthbert and James O. Buckman

718

Environmentally important, poorly crystalline Fe/Mn hydrous oxides: Ferrihydrite and a possibly new vernadite-like mineral from the Clark Fork River Superfund Complex
Michael F. Hochella, Jr., Takeshi Kasama, Andrew Putnis, Christine V. Putnis, and Johnnie N. Moore

725

The true structure of wonesite, an interlayerdeficient trioctahedral sodium mica
Toshihiro Kogure, Ritsuro Miyawaki, and Yasuyuki Banno

737

XRMapAnal: A program for analysis of quantitative X-ray maps
Douglas K. Tinkham and Edward D. Ghent

768

NEW MINERAL NAMES
Paula C. Piilonen, T. Scott Ercit, And Andrew C. Roberts

774

BOOK REVIEW: DEER, HOWIE AND ZUSSMAN ROCK-FORMING MINERALS, SHEET SILICATES: MICAS, volume 3A, 2nd edition. By M.E. Fleet, The Geological Society, London, 2003, 758 pp.
Stephen Guggenheim

776

ERRATUM: 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 by Marilena Stimpfl (2005, vol. 90, p. 155-161, DOI: 10.2138/am.2005.444)