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The spin state of iron in Fe3+-bearing Mg-perovskite and its crystal chemistry at high pressure Izumi Mashino, Eiji Ohtani, Naohisa Hirao, Takaya Mitsui, Ryo Masuda, Makoto Seto, Takeshi Sakai, Suguru Takahashi, and Satoshi Nakano preprint

Ferroan Geikielite and Coupled Spinel-Rutile Exsolution from Titanohematite: Interface Characterization and Magnetic Properties Peter Robinson, Falko Langenhorst, S.A. McEnroe, Karl Fabian, and Tiziana Boffa Ballaran preprint

The nearly complete dissociation of water in glasses with strong aluminum avoidance Wim J. Malfait preprint

A new biogenic, struvite-related phosphate, the ammonium-analogue of hazenite, (NH4)NaMg2(PO4)2⋅14H2O Hexiong Yang, Livia Martinelli, Flavia Tasso, Anna Rosa Sprocati, Flavia Pinzari, Zhenxian Liu, Robert T. Downs, and Henry J. Sun preprint

Interlayer structure model of tri-hydrated low-charge smectite by X-ray diffraction and Monte Carlo modeling in the Grand Canonical ensemble Baptiste Dazas, Eric Ferrage, Alfred Delville, and Bruno Lanson preprint

Characteristics of djerfisherite from fluid-rich, metasomatized alkaline intrusive environments and anhydrous enstatite chondrites and achondrites Patricia L. Clay, Brian O’Driscoll, Brian J. Upton, and Henner Busemann preprint

Constraints on the incorporation mechanism of chlorine in peralkaline and peraluminous Na2O-CaO-Al2O3-SiO2 glasses Amrei Baasner, Ivan Hung, Thomas F. Kemp, Ray Dupree, Burkhard C. Schmidt, and Sharon L. Webb preprint

Reflectance spectroscopy and optical functions for hydrated Fe-sulfates Karly M. Pitman, Eldar Z. Noe Dobrea, Corey S. Jamieson, James B. Dalton III, William J. Abbey, and Emily C. S. Joseph preprint

High-pressure phase transitions in FeCr2O4 and structure analysis of new post-spinel FeCr2O4 and Fe2Cr2O5 phases with meteoritical and petrological implications Takayuki Ishii, Hiroshi Kojitani, Shoichi Tsukamoto, Kiyoshi Fujino, Daisuke Mori, Yoshiyuk Inaguma, Noriyoshi Tsujino, Takashi Yoshino, Daisuke Yamazaki, Yuji Higo, Kenichi Funakoshi, and Masaki Akaogi preprint

A variable-temperature neutron diffraction study of serandite: A Mn-silicate framework with a very strong, two-proton site, hydrogen bond Edward R. Williams and Mark T. Weller preprint

Crystal structure refinement and elasticity of the hexagonal Na0.41[Na0.125Mg0.79Al0.085]2[Al0.79 Si0.21]6O12 (NAL phase) Martha G. Pamato, Alexander Kurnosov, Tiziana Boffa Ballaran, Dmytro M. Trots, Razvan Caracas, and Daniel J. Frost preprint

Ichnusaite, Th(MoO4)2·3H2O, the first natural thorium molybdate: occurrence, description, and crystal structure Paolo Orlandi, Cristian Biagioni, Luca Bindi, and Fabrizio Nestola preprint

Bentonite evolution at elevated pressures and temperatures: An experimental study for generic nuclear repository designs Michael C. Cheshire, Florie A. Caporuscio, Michael S. Rearick, Carlos Jove-Colon, and Mary Kate McCarney preprint

Rates of Li diffusion in garnet: Coupled transport of Li and Y+REEs Ryan C. Cahalan, Eric D. Kelly, and William D. Carlson preprint

Spectral and Thermal Properties of Perchlorate Salts and Implications for Mars Janice L. Bishop, Richard Quinn, and M. Darby Dyar preprint

Tetrahedrally-coordinated Co2+ in oxides and silicates: effect of local environment on optical properties Michele Dondi, Matteo Ardit, Giuseppe Cruciani, and Chiara Zanelli preprint

Multivariate analysis of Raman spectra for the identification of sulfates - Implications for ExoMars Guillermo Lopez-Reyes, Pablo Sobron, Catherine Lefebvre, and Fernando Rull preprint

Experimental Determination of Melting In The Systems Enstatite-Magnesite and Magnesite-Calcite From 15 to 80 Gpa A.R. Thomson, M.J. Walter, O.T. Lord, and S.C. Kohn preprint

Evidence for multiple diamondite-forming events in the mantle Sami Mikhail, Daniel Howell, and Francis M McCubbin preprint

Bond-length fluctuation in the orthorhombic 3×3×1 superstructure of the LiMn2O4 spinel Nobuo Ishizawa, Kenji Tateishi, Shuji Oishi, and Shunji Kishimoto preprint

Beshtauite, (NH4)2(UO2)(SO4)2·2H2O, a new mineral from Mount Beshtau, Northern Caucasus, Russia Igor V. Pekov, Sergey V. Krivovichev, Vasiliy O. Yapaskurt, Nikita V. Chukanov, and Dmitriy I. Belakovskiy preprint

Oriented aggregation as a crystal growth mechanism in natural environments (the sepiolite-palygorskite polysomatic series) Emilia García-Romero and Mercedes Suárez preprint

Bioreduction of biotite and chlorite by a Shewanella species Diana R. Brookshaw, Jonathan R. Lloyd, David J. Vaughan, and Richard A. D. Pattrick preprint

Chromo-alumino-povondraite, NaCr3(Al4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup Leonid Reznitskii, Christine M. Clark, Frank C. Hawthorne, Joel D. Grice, Henrik Skogby, Ulf Hålenius, and Ferdinando Bosi preprint

The petrogenesis of impact basin melt rocks in lunar meteorite Shişr 161 Axel Wittmann, Randy L. Korotev, Bradley L. Jolliff, Thomas J. Lapen, and Anthony J. Irving preprint

In-situ high-pressure transmission electron microscopy for earth and materials sciences Jun Wu and Peter R. Buseck preprint

Te-rich raspite, Pb(W0.56Te0.44)O4, from Tombstone, Arizona, USA: the first natural example of Te6+ substitution for W6+ Marcelo B. Andrade, Hexiong Yang, Robert T. Downs, Robert A. Jenkins, and Isabel Fay preprint

Exploring the effect of lithium on pegmatitic textures – an experimental study Victoria Maneta and Don R. Baker preprint

Pluton Assembly and the Genesis of Granitic Magmas: Insights from the GIC Pluton in Cross Section, Sierra Nevada Batholith, California Keith D. Putirka, Joe Canchola, Jeffrey Rash, Oscar Smith, Gerardo Torrez, Scott R. Paterson, and Mihai Ducea preprint

Stability and spectroscopy of Mg sulfate minerals. Role of hydration on sulfur isotope partitioning Ema Bobocioiu and Razvan Caracas preprint

Ab initio thermodynamic and thermophysical properties of sapphirine end-members in the join Mg4Al8Si2O20 – Mg3Al10SiO20 Donato Belmonte, Giulio Ottonello, and Marino Vetuschi Zuccolini preprint

The 2H and 3R polytypes of sabieite, NH4Fe3+ (SO4)2, from a natural fire in an oil-bearing shale near Milan, Ohio Anthony R. Kampf, R. Peter Richards, and Barbara P. Nash preprint

Redox effects on calcite-portlandite-fluid equilibria at forearc conditions: carbon mobility, methanogenesis, and reduction melting of calcite Codi Lazar, Chi Zhang, Craig E. Manning, and Bjorn O. Mysen preprint

Constraints on the mobilization of Zr in magmatic-hydrothermal processes in subduction zones from in situ fluid-melt partitioning experiments Marion Louvel, Carmen Sanchez-Valle, Wim J. Malfait, Herve Cardon, Denis Testemale, and Jean-Louis Hazemann preprint

Substitution of Ti3+ and Ti4+ in hibonite (CaAl12O19) Patricia M. Doyle, Paul F. Schofield, Andrew J. Berry, Andrew M. Walker, and Kevin S. Knight preprint

First principles elasticity of monocarboaluminate hydrates Juhyuk Moon, Seyoon Yoon, Renata M. Wentzcovitch, and Paulo J.M. Monteiro preprint

XANES Measurements of Cr Valence in Olivine and Their Applications to Planetary Basalts A.S. Bell, P.V. Burger, Loan Le, C.K. Shearer, J.J. Papike, S.R. Sutton, M. Newville, and J. Jones preprint

Synthesis and characterization of the Mars-relevant phosphate minerals Fe- and Mg-whitlockite and merrillite and a possible mechanism that maintains charge balance during whitlockite to merrillite transformation Christopher T. Adcock, Elisabeth M. Hausrath, Paul M. Forster, Oliver Tschauner, and Kirellos J. Sefein preprint

Natural analogues of belite sulfoaluminate cement clinkers from Negev desert, Israel Ella V. Sokol, Svetlana N. Kokh, Yevgeny Vapnik, Vincent Thiéry, and Sophia A. Korzhova preprint

Pressure-volume equation of state for chromite and magnesiochromite: a single-crystal X-ray diffraction investigation Fabrizio Nestola, Benedetta Periotto, Giovanni B. Andreozzi, Enrico Bruschini, and Ferdinando Bosi preprint

Volatile abundances of coexisting merrillite and apatite in the martian meteorite Shergotty: Implications for merrillite in hydrous magmas Francis M. McCubbin, Charles K. Shearer, Paul V. Burger, Erik H. Hauri, Jianhua Wang, Stephen M. Elardo, and James J. Papike preprint

Small grains and big implications: accessory Ti- and Zr-minerals as petrogenetic indicators in HP and UHP marbles Peter Tropper preprint

Dissolution Rates of Amorphous Al- and Fe-Phosphates and their Relevance to Phosphate Mobility on Mars V. M. Tu, E.M. Hausrath, O. Tschauner, V. Iota, and G.W. Egeland preprint

Z-contrast imaging and ab initio study on “d” superstructure in sedimentary dolomite Zhizhang Shen, Hiromi Konishi, Izabela Szlufarska, Philip E. Brown, and Huifang Xu preprint

Identifying the spin transition in Fe2+-rich MgSiO3 perovskite from X-ray diffraction and vibrational spectroscopy Razvan Caracas, Haruka Ozawa, Kei Hirose, Hirofumi Ishii, Nozomu Hiraoka, Yasuo Ohishi, and Naohisa Hirao preprint

The systematics of the spinel-type minerals: an overview Cristian Biagioni and Marco Pasero preprint

Ti- and Zr-minerals in calcite-dolomite marbles from the ultrahigh-pressure Kimi Complex, Rhodope mountains, Greece: Implications for the P-T evolution based on reaction textures, petrogenetic grids and geothermobarometry Alexander Proyer, Ioannis Baziotis, Evripidis Mposkos, and Dieter Rhede preprint

Mantle-Derived Guyanaite In A Cr-Omphacitite Xenolith From Moses Rock Diatreme, Utah Daniel J. Schulze, Roberta L. Flemming, Patrick H.M. Shepherd, and Herwart Helmstaedt preprint

Australian sedimentary opal-A and its associated minerals: Implications for natural silica sphere formation Moritz Liesegang and Ralf Milke preprint

Formation of SiH4 and H2O by the dissolution of quartz in H2 fluid under high pressure and temperature Ayako Shinozakia, Hiroyuki Kagia, Naoki Noguchia, Hisako Hiraib, Hiroaki Ohfujib, Taku Okadac, Satoshi Nakanod, and Takehiko Yagib preprint

Sb5+ and Sb3+ substitution in segnitite: a new sink for As and Sb in the environment and implications for acid mine drainage Stuart J. Mills, Barbara Etschmann, Anthony R. Kampf, Glenn Poirier, and Matthew Newville preprint

The crystallographic and petrogenetic significance of pegmatite phosphates Frédéric Hatert preprint

High pressure behavior of thiospinel CuCr2S4 Matteo Alvaro, Fabrizio Nestola, Nancy Ross, M.Chiara Domeneghetti, and Leonid Reznitsky preprint

Major, minor and trace element composition of pyromorphite-group minerals as recorder of supergene weathering processes from the Schwarzwald mining district, SW Germany Gregor Markl, Michael A. W. Marks, Johannes Holzäpfel, and Thomas Wenzel preprint

An alternative to alteration and melting processes in the Earth: Reaction between hydrogen (H2) and oxide components in the Earth in space and time Bjorn Mysen preprint

The cooling kinetics of plagioclase revealed by electron microprobe mapping Gianluca Iezzi, Silvio Mollo, Edisa Shaini, Andrea Cavallo, and Piergiorgio Scarlato preprint

First principles molecular dynamics simulations of MgSi03 glass at high pressure Dipta Bhanu Ghosh, Bijaya B. Karki, and Lars Stixrude preprint

A New UHP Metamorphic Complex In The ~1.8 Gya Nagssugtoqidian Orogen Of West Greenland William E. Glassley, John A. Korstgård, Kai Sørensen, and Steen W. Platou preprint

Role of silica for the progress of serpentinization reactions: Constraints from successive changes in mineralogical textures of serpentinites from Iwanaidake ultramafic body, Japan Akane Miyoshi, Tetsu Kogiso, Naoto Ishikawa, and Kenji Mibe preprint

A novel technique for fluorapatite synthesis and the thermodynamic mixing behavior of F-OH apatite crystalline solutions Guy L. Hovis, Francis M. McCubbin, Hanna Nekvasil, Gokce Ustunisik, William Woerner, and D.H. Lindsley preprint

Graţianite, MnBi2S4, a new mineral from the Bǎiţa Bihor skarn, Romania Cristiana L. Ciobanu, Joël Brugger, Nigel J. Cook, Stuart J. Mills, Peter Elliott, Gheorghe Damian, and Floarea Damian preprint

Adsorption of sulfur dioxide on volcanic ashes Deborah Schmauss and Hans Keppler preprint

Insights into the crystal chemistry of earth materials rendered by electron density distributions: Pauling’s rules revisited G.V. Gibbs, Nancy L. Ross, David F. Cox, and Kevin M. Rosso preprint

Visible and Short Wave Infrared Reflectance Spectroscopy of REE Fluorocarbonates David J. Turner, Benoit Rivard, and Lee A. Groat preprint

Manganese carbonate formation from amorphous and nanocrystalline precursors: Thermodynamics and geochemical relevance A.V. Radha and Alexandra Navrotsky preprint

Valence state partitioning of V between pyroxene and melt for martian melt compositions Y 980459 and QUE 94201: The effect of pyroxene composition and crystal structure James J. Papike, Paul V. Burger, Aaron S. Bell, and Charles K. Shearer, Loan Le, John Jones, and Paula Provencio preprint

Microporous gold: Comparison of textures from Nature and experiments Victor M. Okrugin, Elena Andreeva, Barbara Etschmann, Allan Pring, Kan Li, Jing Zhao, Grant Griffiths, Gregory R. Lumpkin, Gerry Triani, and Joël Brugger preprint

An assessment of the reliability of melt inclusions as recorders of the pre-eruptive volatile content of magmas Rosario Esposito, Jerry Hunter, James D. Schiffbauer, Nobumichi Shimizu, and Robert J. Bodnar preprint

Sulfidation of native gold Galina Palyanova, Nicholas Karmanov, and Natalie Savva preprint

Toward an accurate ab initio estimation of compressibility and thermal expansion of diamond in 3 the [0, 3000K] temperature, and [0, 30GPa] pressures ranges, at the hybrid HF/DFT theoretical level Mauro Prencipe, Marco Bruno, Fabrizio Nestola, Marco De La Pierre, and Paolo Nimis preprint

Electrical conductivity of synthetic mullite single crystals Mohammed Malki, Jürgen Schreuer, and Hartmut Schneider preprint

In situ Raman spectroscopy identification of the S3- ion in S-rich hydrothermal fluids from synthetic fluid inclusions Nicolas Jacquemet, Damien Guillaume, Antoine Zwick, and Gleb S. Pokrovski preprint

Harmunite CaFe2O4 – a new mineral from the Jabel Harmun, West Bank, Palestinian Autonomy, Israel Irina O. Galuskina, Yevgeny Vapnik, Biljana Lazic, Thomas Armbruster, Mikhail Murashko, and Evgeny V. Galuskin preprint

Effect of orientation on ion track formation in apatite and zircon Weixing Li, Patrick Kluth, Daniel Schauries, Matias D. Rodriguez, Maik Lang, Fuxiang Zhang, Maxim Zdorovets, Christina Trautmann, and Rodney C. Ewing preprint

Bubble formation during decompression of andesitic melts Adrian Fiege, François Holtz, and Sarah B. Cichy preprint

Melting phase equilibria of model carbonated peridotite from 8 to 12 GPa in the system CaO-MgO-Al2O3-SiO2-CO2 and kimberlitic liquids in the Earth's upper mantle Shantanu Keshav and Gudmundur H. Gudfinnsson preprint

Beryllium Mineral Evolution Edward S. Grew and Robert M. Hazen preprint

Ophirite, Ca2Mg4[Zn2Mn3+ 2(H2O)2(Fe3+W9O34)2]•46H2O, a new mineral with a heteropolytungstate tri-lacunary Keggin anion Anthony R. Kampf, John M. Hughes, Barbara P. Nash, Stephen Wright, George R. Rossman, and Joe Marty preprint

Mössbauer parameters of iron in phosphate minerals: Implications for interpretation of Martian data M. Darby Dyar, Erica Jawin, Elly Breves, Gerard Marchand, Melissa Nelms, Melissa D. Lane, Stanley A. Mertzman, David L. Bish, and Janice L. Bishop preprint

Incorporation of Y and REEs in aluminosilicate garnet: Energetics from atomistic simulation William D. Carlson, Julian D. Gale, and Kate Wright preprint

Detection of Iron Substitution in Natroalunite-Natrojarosite Solid Solutions and Potential Implications for Mars Thomas M. McCollom, Bethany L. Ehlmann, Alian Wang, Brian M. Hynek, Bruce Moskowitz, and Thelma S. Berquó preprint

A temperature-controlled sample stage for in situ micro-X-ray diffraction: Application to Mars analogue mirabilite-bearing perennial cold spring precipitate mineralogy Michael S. Bramble, Roberta L. Flemming, Jeffrey L. Hutter, Melissa M. Battler, Gordon R. Osinski, and Neil R. Banerjee preprint

Vanadio-oxy-chromium-dravite, NaV3(Cr4Mg2)(Si6O18)(BO3)3(OH)3O, a new mineral species of the tourmaline supergroup Ferdinando Bosi, Leonid Reznitski, Henrik Skogby, and Ulf Hålenius preprint