1233

Crystal-size and shape distributions of magnetite from uncultured magnetotactic bacteria as a potential biomarker
Balázs Arató, Zoltán Szányi, Christine Flies, Dirk Schüler, Richard B. Frankel, Peter R. Buseck, and Mihály Pósfai

1278

Direct observation of spinodal decomposition in the magnetite-hercynite system by susceptibility measurements and transmission electron microscopy
Ute Golla-Schindler, Hugh St.C. O’Neill, and Andrew Putnis

1308

Dehydration processes in the meta-autunite group minerals meta-autunite, metasaléeite, and metatorbernite
Yohey Suzuki, Tsutomu Sato, Hiroshi Isobe, Toshihiro Kogure, and Takashi Murakami

1375

Synthesis and crystal-chemistry of alkali amphiboles in the system Na₂O-MgO-FeOFe₂O₃-SiO₂-H₂O as a function of
Giancarlo Della Ventura, Gianluca Iezzi, Günther J. Redhammer, Frank C. Hawthorne, Bruno Scaillet, and Daniela Novembre

1402

Makarochkinite, Ca₂Fe²⁺₄Fe³⁺TiSi₄BeAlO₂₀, a new beryllosilicate member of the aenigmatite-sapphirine-surinamite group from the Il’men Mountains (southern Urals), Russia
Edward S. Grew, Jacques Barbier, Jim Britten, Martin G. Yates, Vladislav O. Polyakov, Elena P. Shcherbakova, Ulf Hålenius, and Charles K. Shearer

1413

Formation of lava stalactites in the master tube of the 1792—1793 flow field, Mt. Etna (Italy)
R.A. Corsaro, S. Calvari, and M. Pompilio

1458

α-PbO₂-type nanophase of TiO₂ from coesite-bearing eclogite in the Dabie Mountains, China
Xiuling Wu, Dawei Meng, and Yujing Han

1453

The effect of fictive temperature on Al coordination in high-pressure (10 GPa) sodium aluminosilicate glasses
Jeffrey R. Allwardt, Brent T. Poe, and Jonathan F. Stebbins

1462

Morphological characteristics of ordered kaolinite: Investigation using electron back-scattered diffraction
Jun Kameda, Akihiko Yamagishi, and Toshihiro Kogure

1241

Tourmaline-bearing rocks in the Singhbhum shear zone, eastern India: Evidence of boron infiltration during regional metamorphism
Nandini Sengupta, Dhruba Mukhopadhyay, Pulak Sengupta, and Radegund Hoffbauer

1256

High-resolution transmission electron microscopy (HRTEM) study of the 4a and 6a superstructure of bornite Cu₅FeS₄
Yang Ding, David R. Veblen, and Charles T. Prewitt

1265

Possible Fe/Cu ordering schemes in the 2a superstructure of bornite (Cu₅FeS₄)
Yang Ding, David R. Veblen, and Charles T. Prewitt

1270

TEM-specimen preparation of cell/mineral interfaces by Focused Ion Beam milling
Martin Obst, Philippe Gasser, Denis Mavrocordatos, and Maria Dittrich

1284

Thermodynamics of uranyl minerals: Enthalpies of formation of rutherfordine, UO₂CO₃, andersonite, Na₂CaUO₂(CO₃)₃(H₂O)₅, and grimselite, K₃NaUO₂(CO₃)₃H₂O
Karrie-Ann Kubatko, Katheryn B. Helean, Alexandra Navrotsky, and Peter C. Burns

1291

Mixing and ordering behavior in manganocolumbite-ferrocolumbite solid solution: A single-crystal X-ray diffraction study
Serena C. Tarantino and Michele Zema

1301

Structure change of MgSiO₃, MgGeO₃, and MgTiO₃ ilmenites under compression
T. Yamanaka, Y. Komatsu, M. Sugahara, and T. Nagai

1315

Investigation of the martensitic-like transformation from Mg₂GeO₄ olivine to its spinel structure polymorph
Pamela C. Burnley

1325

A high-temperature diffraction study of the solid solution CaTiOSiO₄-CaTiOGeO₄
Rikke Ellemann-Olesen and Thomas Malcherek

1335

The vibrational spectrum of synthetic hydrogrossular (katoite) Ca₃Al₂(O₄H₄)₃: A lowtemperature IR and Raman spectroscopic study
Boris A. Kolesov and Charles A. Geiger

1342

Structural characterization of biogenic Mn oxides produced in seawater by the marine bacillus sp. strain SG-1
S.M. Webb, B.M. Tebo, and J.R. Bargar

1358

Investigation of smectite hydration properties by modeling experimental X-ray diffraction patterns: Part I. Montmorillonite hydration properties
Eric Ferrage, Bruno Lanson, Boris A. Sakharov, and Victor A. Drits

1384

Compositional zoning in sphalerite crystals
Francesco Di Benedetto, Gian Piero Bernardini, Pilar Costagliola, David Plant, and David J. Vaughan

1393

Structure and the extent of disorder in quaternary (Ca-Mg and Ca-Na) aluminosilicate glasses and melts
Sung Keun Lee, George D. Cody, and Bjorn O. Mysen

1422

Crystal-size distributions of garnets in metapelites from the northeastern Bushveld contact aureole, South Africa
Yasunari Kaneko, Toshiaki Tsunogae, and Takashi Miyano

1434

Early diagenetic origin of Al phosphate-sulfate minerals (woodhouseite and crandallite series) in terrestrial sandstones, Nova Scotia, Canada
Georgia Pe-Piper and Lila M. Dolansky

1442

Scandium silicates from the Baveno and Cuasso al Monte NYF-granites, Southern Alps (Italy): Mineralogy and genetic inferences
F. Pezzotta, V. Diella, and A. Guastoni

1466

NEW MINERAL NAMES
Paula C. Piilonen, and T. Scott Ercit