1120

Magnetic and microscopic characterization of magnetite nanoparticles adhered to clay surfaces
Cecilia Galindo-Gonzalez, Joshua M. Feinberg, Takeshi Kasama, Lionel Cervera Gontard, Mihály Pósfai, Ilona Kósa, Juan D.G. Duran, Jaime E. Gil, Richard J. Harrison, and Rafal E. Dunin-Borkowski

1175

Experimental constraints on rutile saturation during partial melting of metabasalt at the amphibolite to eclogite transition, with applications to TTG genesis
Xiaolin Xiong, Hans Keppler, Andreas Audétat, Gudmundur Gudfinnsson, Weidong Sun, Maoshuang Song, Wansheng Xiao, and Li Yuan

1223

The carbonatation of gypsum: Pathways and pseudomorph formation
Lurdes Fernández-Díaz, Carlos M. Pina, José Manuel Astilleros, and Nuria Sánchez-Pastor

1255

Change in compressibility of δ-AlOOH and δ-AlOOD at high pressure: A study of isotope effect and hydrogen-bond symmetrization
Asami Sano-Furukawa, Hiroyuki Kagi, Takaya Nagai, Satoshi Nakano, Satoshi Fukura, Daichi Ushijima, Riko Iizuka, Eiji Ohtani, and Takehiko Yagi

1279

Evidence in favor of small amounts of ephemeral and transient water during alteration at Meridiani Planum, Mars
Gilles Berger, Michael J. Toplis, Erwan Treguier, Claude d’Uston, and Patrick Pinet

1291

Laser Raman microspectrometry of metamorphic quartz: A simple method for comparison of metamorphic pressures—Corrigendum
William D. Carlson, Emily A. McDowell, Masaki Enami, Tadao Nishiyama, and Takashi Mouri

1283

Native aluminum: Does it exist?
Vesselin M. Dekov, Vasil Arnaudov, Frans Munnik, Tanya B. Boycheva, and Saverio Fiore

1287

Hydration state and activity of aqueous silica in H₂O-CO₂ fluids at high pressure and temperature
Robert C. Newton and Craig E. Manning

1085

Bonded interactions in silica polymorphs, silicates, and siloxane molecules
G.V. Gibbs, A.F. Wallace, D.F. Cox, R.T. Downs, N.L. Ross, and K.M. Rosso

1103

Spatially heterogeneous burial and high-P/T metamorphism in the Crescent Formation, Olympic Peninsula, Washington
David M. Hirsch and R. Scott Babcock

1111

Quantitative microstructural characterization of natrojarosite scale formed during high-pressure acid leaching of lateritic nickel ore
Nicholas E. Timms, Jian Li, and Steven M. Reddy

1130

Single crystal growth of wadsleyite
Anton Shatskiy, Konstantin D. Litasov, Takuya Matsuzaki, Keiji Shinoda, Daisuke Yamazaki, Akira Yoneda, Eiji Ito, and Tomoo Katsura

1137

Elastic behavior and phase stability of pollucite, a potential host for nuclear waste
G. Diego Gatta, Nicola Rotiroti, Tiziana Boffa Ballaran, Carmen Sanchez-Valle, and Alessandro Pavese

1144

Crystal structure determination of anandite-2M mica
Thomas J. Bujnowski, Stephen Guggenheim, and Toshio Kato

1153

Excess heat capacity and entropy of mixing in high structural state plagioclase
Artur Benisek, Edgar Dachs, and Herbert Kroll

1162

Cannibalization of an amphibole-rich andesitic progenitor induced by caldera-collapse during the Matahina eruption: Evidence from amphibole compositions
Chad D. Deering

1187

Mineralogical stability of phyllosilicates in hyperalkaline fluids: Influence of layer nature, octahedral occupation and presence of tetrahedral Al
Ana I. Becerro, Marco Mantovani, and Alberto Escudero

1198

Plumbophyllite, a new species from the Blue Bell claims near Baker, San Bernardino County, California
Anthony R. Kampf, George R. Rossman, and Robert M. Housley

1205

Simultaneous aluminum, silicon, and sodium coordination changes in 6 GPa sodium aluminosilicate glasses
Kimberly E. Kelsey, Jonathan F. Stebbins, Jed L. Mosenfelder, and Paul D. Asimow

1216

Mineral chemistry and alteration of rare earth element (REE) carbonates from alkaline pegmatites of Mount Malosa, Malawi
Alessandro Guastoni, Fabrizio Nestola, and Aurelio Giaretta

1235

Calcium L_2,3-edge XANES of carbonates, carbonate apatite, and oldhamite (CaS)
Michael E. Fleet and Xiaoyang Liu

1242

Thermochemistry of a synthetic Na-Mg-rich triple-chain silicate: Determination of thermodynamic variables
Bridget E. Ams, David M. Jenkins, Juliana Boerio-Goates, Riham Michelle Morcos, Alexandra Navrotsky, and Krassimir N. Bozhilov

1262

Crystal structure and iron topochemistry of erionite-K from Rome, Oregon, U.S.A.
Paolo Ballirano, Giovanni B. Andreozzi, Meral Dogan, and A. Umran Dogan

1271

First-principles energetics and structural relaxation of antigorite
Gian Carlo Capitani, Lars Stixrude, and Marcello Mellini