1402

Limitations of Fe²⁺ and Mn²⁺ site occupancy in tourmaline: Evidence from Fe²⁺– and Mn²⁺-rich tourmaline
Andreas Ertl, Uwe Kolitsch, M. Darby Dyar, John M. Hughes, George R. Rossman, Adam Pieczka, Darrell J. Henry, Federico Pezzotta, Stefan Prowatke, Christian L. Lengauer, Wilfried Körner, Franz Brandstätter, Carl A. Francis, Markus Prem, and Ekkehart Tillma

1446

Argesite, (NH₄)₇Bi₃Cl₁₆, a new mineral from La Fossa Crater, Vulcano, Aeolian Islands, Italy: A first example of the [Bi₂Cl₁₀]⁴⁻ anion
Francesco Demartin, Italo Campostrini, Carlo Castellano, and Carlo Maria Gramaccioli

1452

Experimental study of mineral equilibria in the system K₂O(Li₂O)-Al₂O₃-SiO₂-H₂O-HF at 300 to 600 °C and 100 MPa with application to natural greisen systems
Yu.B. Shapovalov and T.V. Setkova

1483

Ferric iron and water incorporation in wadsleyite under hydrous and oxidizing conditions: A XANES, Mössbauer, and SIMS study
Nathalie Bolfan-Casanova, Manuel Muñoz, Catherine McCammon, Etienne Deloule, Anais Férot, Sylvie Demouchy, Lydéric France, Denis Andrault, and Sakura Pascarelli

1494

Kircherite, a new mineral of the cancrinite-sodalite group with a 36-layer stacking sequence: Occurrence and crystal structure
Fernando Cámara, Fabio Bellatreccia, Giancarlo Della Ventura, Mickey E. Gunter, Marco Sebastiani, and Andrea Cavallo

1519

XAS evidence for the stability of polytellurides in hydrothermal fluids up to 599 °C, 800 bar
Joël Brugger, Barbara E. Etschmann, Pascal V. Grundler, Weihua Liu, Denis Testemale, and Allan Pring

1523

New Mineral Names
Dmitry Belakovskiy, Mark D. Welch, Fernando Cámara, G. Diego Gatta, and Kimberly T. Tait

1515

Gold-telluride nanoparticles revealed in arsenic-free pyrite
Cristiana L. Ciobanu, Nigel J. Cook, Satoshi Utsunomiya, Masashi Kogagwa, Leonard Green, Sarah Gilbert, and Benjamin Wade

1274

Petrography and geochronology of the Pele Mountain quartz-pebble conglomerate uranium deposit, Elliot Lake District, Canada
Laura Bergen and Mostafa Fayek

1269

Electron backscatter diffraction from unpolished particulate specimens: Examples of particle identification and application to inhalable mineral particulate identification
Bryan R. Bandli and Mickey E. Gunter

1284

Celadonite in continental flood basalts of the Columbia River Basalt Group
Leslie L. Baker, William C. Rember, Kenneth F. Sprenke, and Daniel G. Strawn

1291

Thermodynamics of manganese oxides: Effects of particle size and hydration on oxidation-reduction equilibria among hausmannite, bixbyite, and pyrolusite
Nancy Birkner and Alexandra Navrotsky

1299

Grossular: A crystal-chemical, calorimetric, and thermodynamic study
Edgar Dachs, Charles A. Geiger, Artur Benisek, and Klaus-Dieter Grevel

1314

Redetermination of high-temperature heat capacity of Mg₂SiO₄ ringwoodite: Measurement and lattice vibrational model calculation
Hiroshi Kojitani, Madoka Oohata, Toru Inoue, and Masaki Akaogi

1320

Thermal behavior of realgar As₄S₄, and of arsenolite As₂O₃ and non-stoichiometric As₈S_8+x crystals produced from As₄S₄ melt recrystallization
Paolo Ballirano

1330

Thermodynamics of the magnetite-ulv??spinel (Fe₃O₄-Fe₂TiO₄) solid solution
Kristina I. Lilova, Carolyn I. Pearce, Christopher Gorski, Kevin M. Rosso, and Alexandra Navrotsky

1339

Raman spectroscopy of (Ca,Mg)MgSi₂O₆ clinopyroxenes
Mario Tribaudino, Luciana Mantovani, Danilo Bersani, and Pier Paolo Lottici

1348

In-situ Raman spectroscopic study of sulfur speciation in oxidized magmatic-hydrothermal fluids
Huaiwei Ni and Hans Keppler

1354

Structural anisotropy and annealing-induced nanoscale atomic rearrangements in metamict titanite
Tobias Beirau, Boriana Mihailova, Galina Matveeva, Ute Kolb, Thomas Malcherek, Lee A. Groat, and Ulrich Bismayer

1366

Hydrous fluid as the growth media of natural polycrystalline diamond, carbonado: Implication from IR spectra and microtextural observations
Hidemi Ishibashi, Hiroyuki Kagi, Haruko Sakuai, Hiroaki Ohfuji, and Hirochika Sumino

1373

Metastable equilibrium in the C-H-O system: Graphite deposition in crustal fluids
Dionysis I. Foustoukos

1381

Controlled morphogenesis of amorphous silica and its relevance to biosilicification
Jia-Yuan Shi, Qi-Zhi Yao, Xi-Ming Li, Gen-Tao Zhou, and Sheng-Quan Fu

1394

Structural relaxation in tetrahedrally coordinated Co²⁺ along the gahnite-Co-aluminate spinel solid solution
Matteo Ardit, Giuseppe Cruciani, and Michele Dondi

1417

Isothermal compression of face-centered cubic iron
Yu Nishihara, Yoichi Nakajima, Akihiko Akashi, Noriyoshi Tsujino, Eiichi Takahashi, Kenen-ichi Funakoshi, and Yuji Higo

1421

Bonding and structural changes in siderite at high pressure
Gabriela Farfan, Shibing Wang, Hongwei Ma, Razvan Caracas, and Wendy L. Mao

1427

Energetics and kinetics of carbonate orientational ordering in vaterite calcium carbonate
Jianwei Wang and Udo Becker

1437

Growth process and crystallographic properties of ammonia-induced vaterite
Qiaona Hu, Jiaming Zhang, Henry Teng, and Udo Becker

1460

Tobelite and NH⁴⁺-rich muscovite single crystals from Ordovician Armorican sandstones (Brittany, France): Structure and crystal chemistry
Ernesto Mesto, Fernando Scordari, Maria Lacalamita, and Emanuela Schingaro

1469

The enigmatic iron oxyhydroxysulfate nanomineral schwertmannite: Morphology, structure, and composition
Rebecca A. French, Manuel A. Caraballo, Bojeong Kim, J.D. Rimstidt, Mitsuhiro Murayama, and Michael F. Hochella Jr.

1505

Molecular models of birnessite and related hydrated layered minerals
Randall T. Cygan, Jeffrey E. Post, Peter J. Heaney, and James D. Kubicki

1531

Book Review: CHEMICAL BIOMARKERS IN AQUATIC ECOSYSTEMS: By T. Bianchi and E. Canuel. (2011) Princeton University Press. 392 pp. Kindle available. ISBN: 978-0691134147
Josef P. Werne