957

Observation of bicarbonate in calcite by NMR spectroscopy
Jian Feng, Young J. Lee, Richard J. Reeder, and Brian L. Phillips

961

Single-crystal elastic properties of dense hydrous magnesium silicate phase A
Carmen Sanchez-Valle, Stanislav V. Sinogeikin, Joseph R. Smyth, and Jay D. Bass

717

Hourglass sector zoning in metamorphic tourmaline and resultant major and trace element fractionation
Vincent J. van Hinsberg, John C. Schumacher, Stuart Kearns, Paul R.D. Mason, and Gerhard Franz

729

Occurrence and late re-equilibration of pollucite from the Koktokay no. 3 pegmatite, Altai, northwestern China
Ru Cheng Wang, Huan Hu, Ai Cheng Zhang, François Fontan, Hui Zhang, and Philippe de Parseval

740

Chemical bonding and electronic structures of the Al₂SiO₅ polymorphs, andalusite, sillimanite, and kyanite: X-ray photoelectron- and electron energy loss spectroscopy studies
Fumio S. Ohuchi, Subrata Ghose, Mark H. Engelhard, and Donald R. Baer

747

Application of the simple salt lattice energy approximation to the solubility of minerals
Claude H. Yoder and Jeffrey P. Rowand

753

Quench rate and temperature effects on framework ordering in aluminosilicate melts
Emily V. Dubinsky and Jonathan F. Stebbins

762

The effect of sodium on the solubilities of metals in silicate melts
Alexander Borisov, Yann Lahaye, and Herbert Palme

772

Nanotunnels and pull-aparts: Defects of exsolution lamellae in alkali feldspars
John D. Fitz Gerald, Ian Parsons, and Nicola Cayzer

784

The structure and distribution of carbon in 3.5 Ga Apex chert: Implications for the biogenicity of Earth’s oldest putative microfossils
Bradley T. De Gregorio and Thomas G. Sharp

790

Site disorder revealed through Raman spectra from oriented single crystals: A case study on karooite (MgTi₂O₅)
Hanns-Peter Liermann, Robert T. Downs, and Hexiong Yang

794

Single-crystal diffraction and transmission electron microscopy studies of silicified pyrochlore from Narssârssuk, Julianehaab district, Greenland
Paola Bonazzi, Luca Bindi, Matteo Zoppi, Gian Carlo Capitani, and Filippo Olmi

802

Compressibility of synthetic potassium-rich clinopyroxene: In-situ high-pressure single-crystal X-ray study
Luca Bindi, Robert T. Downs, George E. Harlow, Oleg G. Safonov, Yuriy A. Litvin, Leonid L. Perchuk, Hinako Uchida, and Silvio Menchetti

809

The effect of Ca substitution on the elastic and structural behavior of orthoenstatite
Fabrizio Nestola, G. Diego Gatta, and Tiziana Boffa Ballaran

816

Dehydroxylation, proton migration, and structural changes in heated talc: An infrared spectroscopic study
Ming Zhang, Qun Hui, Xiao-Jie Lou, Simon A.T. Redfern, Ekhard K.H. Salje, and Serena C. Tarantino

826

Stabilizing of methane hydrate and transition to a new high-pressure structure at 40 GPa
Hisako Hirai, Shin-ichi Machida, Taro Kawamura, Yoshitaka Yamamoto, and Takehiko Yagi

831

Upper limit of the tetrahedral rotation angle and factors affecting octahedral flattening in synthetic and natural 1M polytype C2/m space group micas
Patrick H.J. Mercier, Denis G. Rancourt, Guenther J. Redhammer, André E. Lalonde, Jean-Louis Robert, Rob G. Berman, and Hideomi Kodama

850

Cation order and hydrogen bonding of high-pressure phases in the Al₂O₃-SiO₂-H₂O system: An NMR and Raman study
Xianyu Xue, Masami Kanzaki, Hiroshi Fukui, Eiji Ito, and Takafumi Hashimoto

862

Relationship among metamorphic grade, vesuvianite rod polytypism, and vesuvianite composition
Edwin Gnos and Thomas Armbruster

871

Assignment of infrared OH-stretching bands in calcic amphiboles through deuteration and heat treatment
Kiyotaka Ishida and Frank C. Hawthorne

880

Direct determination of cation site occupancies in natural ferrite spinels by L_2,3 X-ray absorption spectroscopy and X-ray magnetic circular dichroism
Carolyn I. Pearce, C. Michael B. Henderson, Richard A.D. Pattrick, Gerrit van der Laan, and David J. Vaughan

894

Heat capacities and entropies of mixing of pyrope-grossular (Mg₃Al₂Si₃O₁₂-Ca₃Al₂Si₃O₁₂) garnet solid solutions: A low-temperature calorimetric and a thermodynamic investigation
Edgar Dachs and Charles A. Geiger

907

Fe²⁺ and Fe³⁺ quantification by different approaches and ƒ_O2 estimation for Albanian Cr-spinels
Marco Quintiliani, Giovanni B. Andreozzi, and Giorgio Graziani

917

Inversion twinning in troilite
Roman Skála, Ivana Císačová, and Milan Drábek

922

Chivruaiite, Ca₄(Ti,Nb)₅[(Si₆O₁₇)₂|(OH,O)₅]·13-14H₂O, a new mineral from hydrothermal veins of Khibiny and Lovozero alkaline massifs
Yuri P. Men’shikov, Sergey V. Krivovichev, Yakov A. Pakhomovsky, Victor N. Yakovenchuk, Gregory Yu. Ivanyuk, Julia A. Mikhailova, Thomas Armbruster, and Ekaterina A. Selivanova

929

Pseudojohannite from Jáchymov, Musonoï, and La Creusaz: A new member of the zippeite-group
Joël Brugger, Kia Sheree Wallwork, Nicolas Meisser, Allan Pring, Petr Ondruš, and Jiří Čejka

937

Scheuchzerite, Na(Mn,Mg)₉[VSi₉O₂₈(OH)](OH)₃, a new single-chain silicate
Joël Brugger, Sergey Krivovichev, Nicolas Meisser, Stefan Ansermet, and Thomas Armbruster

944

Mn-tourmaline crystals from island of Elba (Italy): Growth history and growth marks
Giovanna Agrosì, Ferdinando Bosi, Sergio Lucchesi, Giovanni Melchiorre, and Eugenio Scandale

965

Presentation of the Roebling Medal for 2005 of the Mineralogical Society of America to Ho-kwang Mao
Charles T. Prewitt

967

Acceptance of the Mineralogical Society of America Roebling Medal for 2005
Ho-kwang David Mao

969

Presentation of the Mineralogical Society of America Award for 2005 to Tiziana Boffa Ballaran
Ross J. Angel

971

Acceptance of the Mineralogical Society of America Award for 2005
Tiziana Boffa Ballaran

973

Presentation of the Distinguished Public Service Medal of the Mineralogical Society of America for 2005 to Robin Brett
Peter J. Wyllie

975

Acceptance of the Distinguished Public Service Medal for 2005
Robin Brett

976

Presentation of the Mineralogical Society of America Dana Medal for 2005 to William D. Carlson
W.G. Ernst

977

Acceptance of the Dana Medal of the Mineralogical Society of America for 2005
William D. Carlson

717

Hourglass sector zoning in metamorphic tourmaline and resultant major and trace element fractionation
Vincent J. van Hinsberg, John C. Schumacher, Stuart Kearns, Paul R.D. Mason, and Gerhard Franz

831

Upper limit of the tetrahedral rotation angle and factors affecting octahedral flattening in synthetic and natural 1M polytype C2/m space group micas
Patrick H.J. Mercier, Denis G. Rancourt, Guenther J. Redhammer, André E. Lalonde, Jean-Louis Robert, Rob G. Berman, and Hideomi Kodama

862

Relationship among metamorphic grade, vesuvianite rod polytypism, and vesuvianite composition
Edwin Gnos and Thomas Armbruster

894

Heat capacities and entropies of mixing of pyrope-grossular (Mg₃Al₂Si₃O₁₂-Ca₃Al₂Si₃O₁₂) garnet solid solutions: A low-temperature calorimetric and a thermodynamic investigation
Edgar Dachs and Charles A. Geiger