456

Structural relaxation around Cr³⁺ and the red-green color change in the spinel (sensu stricto)-magnesiochromite (MgAl₂O₄-MgCr₂O₄) and gahnite-zincochromite (ZnAl₂O₄-ZnCr₂O₄) solid-solution series
Ulf Hålenius, Giovanni B. Andreozzi, and Henrik Skogby

472

Fantappièite, a new mineral of the cancrinite-sodalite group with a 33-layer stacking sequence: Occurrence and crystal structure
Fernando Cámara, Fabio Bellatreccia, Giancarlo Della Ventura, Annibale Mottana, Luca Bindi, Mickey E. Gunter, and Marco Sebastiani

487

Arsenic-rich fergusonite-beta-(Y) from Mount Cervandone (Western Alps, Italy): Crystal structure and genetic implications
Alessandro Guastoni, Fernando Cámara, and Fabrizio Nestola

495

Crystal structure and low-temperature behavior of “disordered” thomsonite
G. Diego Gatta, Volker Kahlenberg, Reinhard Kaindl, Nicola Rotiroti, Piergiulio Cappelletti, and Maurizio de’ Gennaro

510

Crystal structure analyses of four tourmaline specimens from the Cleopatra’s Mines (Egypt) and Jabal Zalm (Saudi Arabia), and the role of Al in the tourmaline group
Ferdinando Bosi, Tonči Balić-Žunić, and Adel A. Surour

582

Sulfide oxidation observed using micro-Raman spectroscopy and micro-X-ray diffraction: The importance of water/rock ratios and pH conditions
Alexandra Courtin-Nomade, Hubert Bril, Jean-Michel Bény, Martin Kunz, and Nobumichi Tamura

602

Crystal chemistry of the MgAl₂O₄-MgMn₂O₄-MnMn₂O₄ system: Analysis of structural distortion in spinel- and hausmannite-type structures
Ferdinando Bosi, Ulf Hålenius, and Henrik Skogby

622

Mineralogy and origin of oxygen-bearing platinum-iron grains based on an X-ray absorption spectroscopy study
Kéiko H. Hattori, Yoshio Takahashi, and Thierry Augé

651

Pressure-induced transformations in kaolinite
Mark D. Welch and Wilson A. Crichton

655

The crystal structure of gypsum-II determined by single-crystal synchrotron X-ray diffraction data
Sabrina Nazzareni, Paola Comodi, Luca Bindi, and Leonid Dubrovinsky

425

Fe site occupancy in magnetite-ulv??spinel solid solutions: A new approach using X-ray magnetic circular dichroism
Carolyn I. Pearce, C. Michael B. Henderson, Neil D. Telling, Richard A.D. Pattrick, John M. Charnock, Victoria S. Coker, Elke Arenholz, Floriana Tuna, and Gerrit van der Laan

440

Discovery, mineral paragenesis, and origin of wadalite in a meteorite
Hope A. Ishii, Alexander N. Krot, John P. Bradley, Klaus Keil, Kazuhide Nagashima, Nick Teslich, Benjamin Jacobsen, and Qing-Zhu Yin

449

Cathodoluminescence microscopy and spectroscopy of synthetic ruby crystals grown by the optical floating zone technique
Christo Guguschev, Jens G??tze, and Matthias G??bbels

463

Recrystallization in fully metamict gadolinite from Ytterby (Sweden), annealed in air and studied by ⁵⁷Fe M??ssbauer spectroscopy
Dariusz Malczewski

481

Reinvestigation of the crystal structure of the zeolite gobbinsite: A single-crystal X-ray diffraction study
G. Diego Gatta, William D. Birch, and Nicola Rotiroti

503

Cooling-induced crystallization of microlite crystals in two basaltic pumice clasts
Lindsay Szramek, James E. Gardner, and Matthias Hort

519

Combined single-crystal X-ray and neutron powder diffraction structure analysis exemplified through full structure determinations of framework and layer beryllate minerals
Jennifer A. Armstrong, Henrik Friis, Alexandra Lieb, Adrian A. Finch, and Mark T. Weller

527

Olivine crystal size distributions in kimberlite
Stephen Moss, James Kelly Russell, Barbara H. Scott Smith, and Richard Curtis Brett

537

Solubility of manganotantalite and manganocolumbite in pegmatitic melts
Alexander Bartels, Francois Holtz, and Robert L. Linnen

545

The effect of silica on ferric/ferrous ratio in silicate melts: An experimental study using M??ssbauer spectroscopy
Alexander Borisov and Catherine McCammon

556

HRTEM investigation of trilling todorokite and nano-phase Mn-oxides in manganese dendrites
Huifang Xu, Tianhu Chen, and Hiromi Konishi

563

Thermo-chemical and thermo-physical properties of the high-pressure phase anhydrous B (Mg₁₄Si₅O₂₄): An ab-initio all-electron investigation
G. Ottonello, B. Civalleri, J. Ganguly, W.F. Perger, D. Belmonte, and M. Vetuschi Zuccolini

574

The incommensurately modulated structures of natural natrite at 120 and 293 K from synchrotron X-ray data
Alla Arakcheeva, Luca Bindi, Philip Pattison, Nicolas Meisser, Gervais Chapuis, and Igor Pekov

592

In situ measurements of plagioclase growth using SIMS depth profiles of ⁷Li/³⁰Si: A means to acquire crystallization rates during short-duration decompression events
Kimberly Genareau and Amanda B. Clarke

608

The effect of Al and water on the compressibility of diopside
Polina Gavrilenko, Tiziana Boffa Ballaran, and Hans Keppler

617

Geothermometric study of Mg-rich spinels from the Somma-Vesuvius volcanic complex (Naples, Italy)
Sergio Lucchesi, Ferdinando Bosi, and Antonio Pozzuoli

631

Serpentine minerals discrimination by thermal analysis
Cecilia Viti

639

A new type of cubic-stacked layer structure in anthoinite, AlWO₃(OH)₃
Ian E. Grey, Ian C. Madsen, Stuart J. Mills, Frederic Hatert, Vanessa K. Peterson, and Timothy J. Bastow

646

Townendite, Na₈ZrSi₆O₁₈, a new uranium-bearing lovozerite group mineral from the Il??maussaq alkaline complex, Southern Greenland
Ian E. Grey, Colin M. Macrae, W. Gus Mumme, and Allan Pring

659

Presentation of the 2009 Roebling Medal of the Mineralogical Society of America to Alexandra Navrotsky
Nancy L. Ross

661

Acceptance of the Roebling Medal for 2009 of the Mineralogical Society of America
Alexandra Navrotsky

662

Presentation of the Mineralogical Society of America Award for 2009
Gordon E. Brown, Jr.

664

Acceptance of the Mineralogical Society of America Award for 2009
Thomas P. Trainor

666

Presentation of the Distinguished Public Service Medal of the Mineralogical Society of America for 2009
Russell J. Hemley

667

Acceptance of the Mineralogical Society of America Distinguished Public Service Medal for 2009
Robert M. Hazen

668

Presentation of the Mineralogical Society of America Dana Medal for 2009 to Ronald E. Cohen
Russell J. Hemley

669

Acceptance of the Dana Medal of the Mineralogical Society of America for 2009
Ronald E. Cohen