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The information in these preprints is subject to change. These preprints are unedited manuscripts accepted for publication that will undergo copyediting, layout, and review of the proof before being published. Always consult the final, published document. All legal disclaimers that apply to the journal apply to these preprints.

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Please cite these papers: Authors (year) title. American Mineralogist, in press. DOI


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First evidence of CaCO3-III and CaCO3-IIIb - high-pressure polymorphs of calcite – authigenically formed in near surface sediments Maike Schaebitz, Richard Wirth, Christoph Janssen, and Georg Dresen preprint

Pieczkaite, ideally Mn5(PO4)3Cl, a new apatite-supergroup mineral from Cross Lake, Manitoba, Canada: Description and crystal structure Kimberly Tait, Neil A. Ball, and Frank C. Hawthorne preprint

Quantification of Water in Majoritic Garnet Sylvia-Monique Thomas, Kathryn Wilson, Monika Koch-Müller, Erik H. Hauri, Catherine McCammon, Steven D. Jacobsen, John Lazarz, Dieter Rhede, Minghua Ren, Neal Blair, and Stephan Lenz preprint

Transition metal cation site preferences in forsterite (Mg2SiO4) determined from paramagnetically shifted NMR resonances Ryan J. McCarty, Aaron C. Palke, Jonathan F. Stebbins, and J. Stephen Hartman preprint

Impact of preparation method and chemical composition on physicochemical and photocatalytic properties of nano-dimensional magnetite-type materials Zara P. Cherkezova-Zheleva, Katerina L. Zaharieva, Martin P. Tsvetkov, Vilma S. Petkova, Maria M. Milanova, and Ivan G. Mitov preprint

Reaction pathways towards the formation of dolomite Carlos M. Pina preprint

Influence of hydration on 23Na, 27Al and 29Si MAS-NMR 2 spectra of sodium saponites and sodium micas J. Sanz, I.Sobrados, and J. L. Robert preprint

The many facets of apatite John M. Hughes preprint

Surface transformations of platinum grains from Fifield, New South Wales, Australia S. Gordon Campbell, Frank Reith, Barbara Etschmann, Joël Brugger, Gema Martinez-Criado, Robert A. Gordon, and Gordon Southam preprint

Hydrous Species in Feldspars: a Reassessment Based on FTIR and SIMS Jed L. Mosenfelder, George R. Rossman, and Elizabeth A. Johnson preprint

An insight at the inverse transformation of realgar altered by light Giovanni Pratesi and Matteo Zoppi preprint

Effect of pores and grain size on the elastic and piezoelectric properties of quartz based materials Julie Aufort, Oktay Aktas, Michael A. Carpenter, and Ekhard K.H. Salje preprint

American Mineralogist Special Collection: Building Planets Tracy Rushmer and Heather C. Watson preprint

Bursting the bubble of melt inclusions Jacob B. Lowenstern preprint

Competition between two redox states in silicate melts: an in-situ simultaneous experiment at the Fe K-edge and Eu L3-edge Maria Rita Cicconi, Daniel R. Neuville, Isabelle Tannou, François Baudelet, Paul Floury, Eleonora Paris, and Gabriele Giuli preprint

Routine characterization and interpretation of complex alkali feldspar intergrowths Ian Parsons, John D. Fitz Gerald, and Martin R. Lee preprint

Insights into the structure of mixed CO2/CH4 in gas hydrates S. Michelle Everett, Claudia J. Rawn, Bryan C. Chakoumakos, David J. Keffer, Ashfia Huq, and Tommy J. Phelps preprint

Very large differences in intramolecular D-H partitioning in hydrated silicate melts synthesized at upper mantle pressures and temperatures Ying Wang, Samantha X. Cody, Dionysis Foustoukos, Bjorn O. Mysen, and George D. Cody preprint

Temperature dependence of crystal structure of CaGeO3 high-pressure perovskite phase and experimental determination of its Debye temperatures studied by low- and high-temperature single crystal X-ray diffraction Akihiko Nakatsuka, Shoichi Kuribayashi, Noriaki Nakayama, Hiroshi Fukui, Hiroshi Arima, Akira Yoneda, and Akira Yoshiasa preprint

Optical properties of siderite (FeCO3) across the spin transition: Crossover to iron-rich carbonates in the lower mantle Sergey S. Lobanov, Alexander F. Goncharov, and Konstantin D. Litasov/td> preprint

First-Principles Prediction of Pressure Enhanced Defect Segregation and Migration at MgO Grain Boundaries Bijaya B. Karki, Dipta B. Ghosh, and Ashok K. Verma preprint

Thermal expansion of F-Cl apatite crystalline solutions Guy Hovis, Tony Abraham, William Hudacek, Sarah Wildermuth, Brian Scott, Caitlin Altomare, Aaron Medford, Maricate Conlon, Matthew Morris, Amanda Leaman, Christine Almer, Gary Tomaino, and Daniel Harlov preprint

Complex IR spectra of OH- groups in silicate glasses: implications for the use of the 4500 cm-1 IR peak as a marker of OH- groups concentration Charles Le Losq, George D. Cody, and Bjorn O. Mysen preprint

A route for the direct crystallization of dolomite Juan Diego Rodriguez-Blanco, Samuel Shaw and Liane G. Benning preprint

Cation exchange capacity and water content of opal in sedimentary basins: example from the Monterey Formation, California Arkadiusz Derkowski, Jan Środoń, and Douglas K. McCarty preprint

Fayalite oxidation processes in Obsidian Cliffs rhyolite flow, Oregon Audrey M. Martin, Etienne Médard, Bertrand Devouard, Lindsay P. Keller, Kevin Righter, Jean-Luc Devidal, and Zia Rahman preprint

Melt Inclusion CO2 Contents, Pressures of Olivine Crystallization, and the Problem of Shrinkage Bubbles Paul J. Wallace, Vadim S. Kamenetsky, and Pablo Cervantes preprint

Highlights and Breakthroughs article for Thomas Bristow David Bish et al.,:The origin and implications of clay minerals from Yellowknife Bay, Gale crater, Mars Javier Cuadros preprint

Tweed, Twins and Holes: a link between Mineralogy and Materials Science Wilfried Schranz preprint

Hydrothermal chloritization process from biotite in the Toki granite, Central Japan: Temporal variation of chemical characteristics in hydrothermal fluid associated with the chloritization Takashi Yuguchi, Eiji Sasao, Masayuki Ishibashi, and Tadao Nishiyama preprint

Low pressure crystallization of a volatile-rich lunar basalt: a means for producing local anorthosites Nicholas J. DiFrancesco, Hanna Nekvasil, Donald H. Lindsely, and G. Ustunisik preprint

Atom probe tomography of isoferroplatinum Stephen W. Parman, David R. Diercks, Brian P. Gorman, and Reid F. Cooper preprint

Eckermannite revised. The new holotype from the Jade Mine Tract, Myanmar: crystal structure, mineral data and hints on the reasons for the rarity of eckermannite Roberta Oberti, Massimo Boiocchi, Frank C. Hawthorne , Neil A. Ball, and George E. Harlow preprint

Modelling siderophile elements during core formation and accretion, and the role of the deep mantle and volatiles Kevin Righter preprint

Calculation of the energetics of water incorporation in majorite garnet Jeffrey S. Pigott, Kate Wright, Julian D. Gale, and Wendy R. Panero preprint

Density Functional investigation of the thermo-physical and thermo-chemical properties of 2M1 Muscovite Gianfranco Ulian and Giovanni Valdrè preprint

Synchrotron micro-spectroscopic examination of Indonesian nickel laterites Rong Fan and Andrea R. Gerson preprint

Experimental Constraints on Fluid-Rock Reactions During Incipient Serpentinization of Harzburgite Frieder Klein, Niya G. Grozeva, Jeffrey S. Seewald, Thomas M. McCollom, Susan E. Humphris, Bruce Moskowitz, Thelma S. Berquó, and Wolf-Achim Kahl preprint

Experiments and models on H2O retrograde solubility in volcanic systems Amy G. Ryan, James K. Russell, Alexander R.L. Nichols, Kai-Uwe Hess, and Lucy A. Porritt preprint

The fall and rise of metamorphic zircon Matthew J. Kohn, Stacey L. Corrie, and Christopher Markley preprint

Petalite under Pressure: Elastic Behavior and Phase Stability Nancy L. Ross, Jing Zhao, Carla Slebodnick, Elinor C. Spencer, and Bryan C. Chakoumakos preprint

The origin and implications of clay minerals from Yellowknife Bay, Gale crater, Mars Thomas F. Bristow, David L. Bish, David T. Vaniman, Richard V. Morris, David F. Blake, John P. Grotzinger, Elizabeth B. Rampe, Joy A. Crisp, Cherie N. Achilles, Doug W. Ming, Bethany L. Ehlmann, Penelope L. King, John C. Bridges, Jennifer L. Eigenbrode, Dawn Y. Sumner, Steve J. Chipera, John Michael Moorokian, Allan H. Treiman, Shaunna M. Morrison, Robert T. Downs, Jack D. Farmer, David Des Marais, Philippe Sarrazin, Melissa M. Floyd, Michael A. Mischna, and Amy C. McAdam preprint

Block-by-Block and Layer-by-Layer Growth Modes in Corallium sp. Skeletons Jonathan Perrina, Daniel Vielzeufa, Angèle Ricolleaua, Hervé Dallaportaa, Solène Valtonb, and Nicole Floqueta preprint

Spatio-temporal constraints on magma storage and ascent conditions in a transtensional tectonic setting: The case of the Terceira Island (Azores) Vittorio Zanon and Adriano Pimentel preprint

Crystal chemical and structural modifications of erionite fibers leached with simulated lung fluids Paolo Ballirano and Georgia Cametti preprint

Structural investigation of (130) twins and rutile precipitates in chrysoberyl crystals from Rio das Pratinhas in Bahia (Brazil) Sandra Drev, Matej Komelj, Matjaž Mazaj, Nina Daneu and Aleksander Rečnik preprint

Kinetic behavior of partially dehydroxylated kaolinite Victor A. Drits and Arkadiusz Derkowski preprint

Bubbles matter: An assessment of the contribution of vapor bubbles to melt inclusion volatile budgets Lowell Moore, Esteban Gazel, Robin Tuohy, Alex Lloyd, Rosario Esposito, Matthew Steele-MacInnis, Erik H. Hauri, Paul J. Wallace, Terry Plank, and Robert J. Bodnar preprint

Carbon speciation in silicate-C-O-H melt and fluid as a function of redox conditions: An experimental study, in-situ to 1.7 GPa and 900°C Bjorn Mysen preprint

Pre-Eruptive Magma Mixing and Crystal Transfer Revealed by Phenocryst and Microlite Compositions in Basaltic Andesite from the 2008 Eruption of Kasatochi Island Volcano Owen K. Neill, Jessica F. Larsen, Pavel E. Izbekov, and Christopher J. Nye preprint

In-situ oxygen isotope and trace element geothermometry of rutilated quartz from Alpine fissures Danielle Ziva Shulaker, Axel K. Schmitt, Thomas Zack, and Ilya Bindeman preprint

Constraints on the origin of sub-effusive nodules from the Sarno (Pomici di Base) eruption of Mt. Somma-Vesuvius (Italy) based on compositions of silicate-melt inclusions and clinopyroxene Rita Klébesz, Rosario Esposito, Benedetto De Vivo, and Robert J. Bodnar preprint

Timescales of exhumation and cooling inferred by kinetic modelling: An example using a lamellar garnet pyroxenite from the Variscan Granulitgebirge, E Germany Thomas Müller, Hans-Joachim Massonne, and Arne P. Willner preprint

Revised mineral and Mg# maps of the Moon from integrating results from the Lunar Prospector neutron and gamma ray spectrometers with Clementine spectroscopy Sarah T. Crites and Paul G. Lucey preprint

The whole-block approach to measuring hydrogen diffusivity in nominally anhydrous minerals Elizabeth Ferriss, Terry Plank, David Walker, and Meredith Nettles preprint

Hydrothermal synthesis and crystal structure of AlSO4(OH): A titanite-group member Alan J. Anderson, Hexiong Yang, and Robert T. Downs preprint

Akaganéite and schwertmannite: Spectral properties and geochemical implications of their possible presence on Mars Janice L. Bishop, Enver Murad, and M. Darby Dyar preprint

Tweed, Twins, and Holes Ekhard K.H. Salje preprint

Toward theoretical mineralogy: a bond-topological approach Frank C. Hawthorne preprint

Kojonenite, a new palladium tin telluride mineral from the Stillwater Layered Igneous Intrusion, Montana, USA Chris J Stanley and Anna Vymazalová preprint

Mössbauer spectroscopic study of natural eosphorite, [(Mn, Fe)AlPO4(OH)2H2O] Antoine Van Alboom, Valdirene Gonzaga de Resende, Geraldo Magela da Costa, and Eddy De Grave preprint

INTRINSIC CONDITIONS OF MAGMAS FROM THE LUNAR CRATER VOLCANIC FIELD (NEVADA): IMPLICATIONS FOR INTERNAL PLUMBING AND MAGMA ASCENT Joaquín A. Cortés, Eugene I. Smith, Greg A. Valentine, Racheal Johnsen, Christine Rasoazanamparany, Elisabeth Widom, Mai Sas, and Dawn Ruth preprint

Synthesis of Stoichiometric Nickel Aluminate Spinel Nanoparticles Md. Hasan, John Drazin, Sanchita Dey, and Ricardo H. R. Castro preprint

The elasticity of MgAl2O4-MnAl2O4 spinels by Brillouin scattering and an empirical approach for bulk modulus prediction Enrico Bruschini, Sergio Speziale, Giovanni B. Andreozzi, Ferdinando Bosi, and Ulf Hålenius preprint

Trace and minor elements in galena: A reconnaissance LA-ICP-MS study Luke George, Nigel J. Cook, Cristiana L. Ciobanu, and Benjamin P. Wade preprint

Klebelsbergite, Sb4O4SO4(OH)2: stability relationships, formation in Nature, and refinement of its structure Adam. J. Roper, Peter Leverett, Timothy D. Murphy, and Peter. A. Williams preprint

A Rock Fragment Related to the Magnesian Suite in Lunar Meteorite Allan Hills (ALHA) A81005 Allan H. Treiman and Juliane Gross preprint

The catalytic effect of bound extracellular polymeric substances excreted by anaerobic microorganisms on Ca-Mg carbonate precipitation: Implications for the “dolomite problem” Fangfu Zhang, Huifang Xu, Evgenya S. Shelobolina, Hiromi Konishi, Brandon Converse, Zhizhang Shen, and Eric E. Roden preprint

Experimental and Modeled Chlorine Solubilities in Aluminosilicate Melts at 1 to 7000 Bars and 700 to 1250°C: Applications to Magmas of Augustine Volcano, Alaska James D. Webster, Francesco Vetere, Roman E. Botcharnikov, Beth Goldoff, Alexander Mcbirney, and Angela L. Doherty preprint

Direct observation of Ca-Na ordering and structure polarity in Ca-rich intermediate plagioclase feldspar with incommensurate modulated structure Huifang Xu preprint

Cation order-disorder in Fe-bearing pyrope and grossular garnets: An 27Al and 29Si MAS NMR and 57Fe Mössbauer spectroscopy study Aaron C. Palke, Jonathan F. Stebbins, Charles A. Geiger, and Gerold Tippelt preprint

Stability and adhesion of calcite/montmorillonite assembly W. Sekkal, A. Zaoui and I. Shahrour preprint

Complete substitution of Fe2+ by Mg in Fe4O5: the crystal structure of the Mg2Fe2O5 end-member Tiziana Boffa Ballaran, Laura Uenver-Thiele, and Alan B. Woodland preprint

Anhydrite: An important sulfur binder limiting the climatic impact of subaerial volcanic eruptions Marcus Nowak preprint

Experimental study along the magnesio-hornblende–glaucophane join Jie Lei, David M. Jenkins, and Kiyotaka Ishida preprint

Balestraite, KLi2VSi4O10O2, the first member of the mica group with octahedral V5+ G.O. Lepore, L. Bindi, A. Zanetti, M.E. Ciriotti, O. Medenbach, and P. Bonazzi preprint

Possible new Ca-REE-Bi phosphate minerals from a tungsten-rich calcsilicate skarn, Sierra Nevada Mountains, California Beverly J. Berekian, Diane Clemens-Knott, and Chi Ma preprint

Cathodoluminescence dependence on feldspar mineral structure and implications for forensic geology Sarah A. Brokus, Danielle K. Silletti, J. Mark Lunderberg, Paul A. DeYoung, Graham F. Peaslee, Dyanne E. Carpenter, and JoAnn Buscaglia preprint

In situ observation of the pyroxene-majorite transition in Na2MgSi5O12 using synchrotron radiation and Raman spectroscopy of Na-majorite Anna Dymshits, Igor Sharygin, Konstantin Litasov, Anton Shatskiy, Pavel Gavryushkin, Eiji Ohtani, Akio Suzuki, and Kenichi Funakoshi preprint

Carbonate mineralization in percolated olivine aggregates: Linking effects of crystallographic orientation and fluid flow Steve Peuble, Muriel Andreani, Marguerite Godard, Philippe Gouze, Fabrice Barou, Bertrand Van de Moortele, David Mainprice, and Bruno Reynard preprint

Trinitite redux: Mineralogy and petrology G. Nelson Eby, Norman Charnley, Duncan Pirrie, Robert Hermes, John Smoliga, and Gavyn Rollinson preprint

Alkali influence on the water speciation and the environment of protons in silicate glasses revealed by 1H MAS NMR spectroscopy Charles Le Losq, George D. Cody, and Bjorn O. Mysen preprint

Pauloabibite, trigonal NaNbO3, isostructural with ilmenite, from the Jacupiranga carbonatite, Cajati, São Paulo, Brazil Luiz A.D. Menezes Filho, Daniel Atencio, Marcelo B. Andrade, Robert T. Downs, Mário L.S.C. Chaves, Antônio W. Romano, Ricardo Scholz, and Aba I. C. Persiano preprint

A Refined Monoclinic Structure for a Variety of “Hydrohematite” Kristina M. Peterson, Peter J. Heaney, Jeffrey E. Post, and Peter J. Eng preprint

Prevalence of growth twins among anhedral plagioclase microlites Carrie R. Brugger and Julia E. Hammer preprint

Prediction of enthalpies of formation of hydrous sulfates Sophie Billon and Philippe Vieillard preprint

Non-invasive assessment of the formation of tourmaline nodules by X-ray microtomography and computer modeling Luca Valentini, Barbara Marchesini, Matteo Parisatto, Diego Perugini, and Gilberto Artiolis preprint

The chemical behavior of fluids released during deep subduction based on fluid inclusions Maria Luce Frezzotti and Simona Ferrando preprint