433

Andalusite-sillimanite replacement (Mazarrán, SE Spain): A microstructural and TEM study
Bernardo Cesare, Maria Teresa Gómez-Pugnaire, Antonio Sánchez-Navas, and Bernard Grobety

501

The role of Fe and cation order in the crystal chemistry of surinamite, (Mg,Fe²⁺)₃(Al,Fe³⁺)₃O
[AlBeSi₃O₁₅]: A crystal structure, Mössbauer spectroscopic, and optical spectroscopic study
Jacques Barbier, Edward S. Grew, Elke Hålenius, Ulf Hålenius, and Martin G. Yates

533

In-situ synchrotron study of the kinetics, thermodynamics, and reaction mechanisms of the hydrothermal crystallization of gyrolite, Ca₁₆Si₂₄O₆₀(OH)₈·14H₂O
Samuel Shaw, C. Michael B. Henderson, and Simon M. Clark

566

A new polymorph of eucryptite (LiAlSiO₄), ε-eucryptite, and thermal expansion of α- and ε-eucryptite at high pressure
Jianzhong Zhang, Aaron Celestian, John B. Parise, Hongwu Xu, and Peter J. Heaney

373

Introduction to the Michael J. Holdaway commemorative issue
Barbara L. Dutrow

375

Titanium in biotite from metapelitic rocks: Temperature effects, crystal-chemical controls, and petrologic applications
Darrell J. Henry and Charles V. Guidotti

383

Local equilibrium in polymetamorphic gneiss and the titanium substitution in biotite
D.J. Waters and N.R. Charnley

397

The enthalpy of formation and internally consistent thermodynamic data of Mg-staurolite
Klaus-D. Grevel, Alexandra Navrotsky, Thomas Fockenberg, and Juraj Majzlan

405

Coexisting andalusite, kyanite, and sillimanite: Sequential formation of three Al₂SiO₅ polymorphs during progressive metamorphism near the triple point, Sivrihisar, Turkey
Donna L. Whitney

417

Co-existing aluminum silicates in quartz veins: A quantitative approach for determining andalusite-sillimanite equilibrium in natural samples using oxygen isotopes
Aaron J. Cavosie, Zachary D. Sharp, and J. Selverstone

424

Stability of corundum + quartz relative to kyanite and sillimanite at high temperature and pressure
Daniel E. Harlov and Ralf Milke

445

Hydroxyl-rich topaz in high-pressure and ultrahigh-pressure kyanite quartzites, with retrograde woodhouseite, from the Sulu terrane, eastern China
Ru Y. Zhang, Juhn G. Liou, and Jin F. Shu

454

Coesite exsolution from supersilicic titanite in UHP marble from the Kokchetav Massif, northern Kazakhstan
Yoshihide Ogasawara, Kyoka Fukasawa, and Shigenori Maruyama

462

Composition of synthetic tremolite-tschermakite solid solutions in amphibole + anorthite- and amphibole + zoisite-bearing assemblages
Jens Najorka, Matthias Gottschalk, and Wilhelm Heinrich

478

Paragenesis and thermobarometry of Ca-amphiboles in the Barcroft granodioritic pluton, central White Mountains, eastern California
W.G. Ernst

491

B and Li in Proterozoic metapelites from the Black Hills, U.S.A.: Implications for the origin of leucogranitic magmas
Max Wilke, Peter I. Nabelek, and Michael D. Glascock

514

Fe³⁺ and Fe²⁺ partitioning among silicates in metapelites: A synchrotron micro-XANES study
M. Darby Dyar, Emily W. Lowe, Charles V. Guidotti, and Jeremy S. Delaney

523

Thermodynamic and structural behavior of analcime-leucite analogue systems
Guy L. Hovis, Jacques Roux, and Elizabeth Rodrigues

542

The crystal structures of grossular and spessartine between 100 and 600 K and the crystal chemistry of grossular-spessartine solid solutions
Uta Rodehorst, Charles A. Geiger, and Thomas Armbruster

550

The structures of becquerelite and Sr-exchanged becquerelite
Peter C. Burns and Yaping Li

558

Elasticity and equation of state of orthoenstatite, MgSiO₃
Ross J. Angel and Jennifer M. Jackson

562

Reidite: An impact-produced high-pressure polymorph of zircon found in marine sediments
Billy P. Glass, Shaobin Liu, and Peter B. Leavens

572

Disordering during melting: An ¹⁷O NMR Study of crystalline and glassy CaTiSiO₅ (titanite)
Scott Kroeker, David Rice, and Jonathan F. Stebbins

580

Characterization of Mn oxides in cemented streambed crusts from Pinal Creek, Arizona, U.S.A., and in hot-spring deposits from Yuno-Taki Falls, Hokkaido, Japan
Halka Bilinski, Rudolf Giovanoli, Akira Usui, and Darko Hanzel

592

BOOK REVIEW: ENVIRONMENTAL MINERALOGY: MICROBIAL INTERACTIONS, ANTHROPOGENIC INFLUENCES, CONTAMINATED LAND, AND WASTE MANAGEMENT. J.D. Cotter-Howells, L.S. Campbell, E. Valsami-Jones, and M. Batchelder, Eds. (2000) The Mineralogical Society Series, no. 9, 414 p.
Garrison Sposito

592

ERRATUM: Polysomatism in h??gbomite: The crystal structures of 10T, 12H, 14T, and 24R polysomes by Clivia Hejny and Thomas Armbruster (v. 87, pages 277-292, 2002).