1345

Enthalpies of formation of tremolite and talc by high-temperature solution calorimetry – a consistent picture
Wolf-Achim Kahl and Walter V. Maresch

1367

Thermal decomposition of rhombohedral KClO₃ from 29–76 kilobars and implications from the molar volume of fluid oxygen at high pressures
Marie C. Johnson, David Walker, Simon M. Clark, and Raymond L. Jones

1483

Crystal structure of phase X, a high pressure alkali-rich hydrous silicate and its anhydrous equivalent
Hexiong Yang, Jürgen Konzett, and Charles T. Prewitt

1494

Description and crystal structure of turtmannite, a new mineral with a 68 Å period related to mcgovernite
Joël Brugger, Thomas Armbruster, Nicolas Meisser, Clivia Hejny, and Bernard Grobety

1513

Crystal structures of Na and K aluminate mullites
Reinhard X. Fischer, Martin Schmücker, Paul Angerer, and Hartmut Schneider

1519

From mastodon ivory to gemstone: The origin of turquoise color in odontolite
Ina Reiche, Colette Vignaud, Bernard Champagnon, Gérard Panczer, Christian Brouder, Guillaume Morin, Vicente Armando Solé, Laurent Charlet, and Michel Menu

1530

Ikaite, CaCO₃·6H₂O: Cold comfort for glendonites as paleothermometers
Ian P. Swainson and Robert P. Hammond

1525

Elasticity of single-crystal calcite and rhodochrosite by Brillouin spectroscopy
Chien-Chih Chen, Chung-Cherng Lin, Lin-Gun Liu, Stanislav V. Sinogeikin, and Jay D. Bass

1321

First-principles modeling of the infrared spectrum of kaolinite
Etienne Balan, A. Marco Saitta, Francesco Mauri, and Georges Calas

1331

Determination of the limiting fictive temperature of silicate glasses from calorimetric and dilatometric methods: Application to low-temperature liquid volume measurements
Jean A. Tangeman and Rebecca A. Lange

1358

Evidence for an I2/a to Imab phase transition in the silica polymorph moganite at ~570 K
Peter J. Heaney and Jeffrey E. Post

1380

High-pressure behavior of clinochlore
Mark D. Welch and William G. Marshall

1387

Structure and elasticity of wadsleyite at high pressures
B. Kiefer, L. Stixrude, J. Hafner, and G. Kresse

1396

Determination of the fluid-absent solidus and supersolidus phase relationships of MORB-derived amphibolites in the range 4-14 kbar
Susana López and Antonio Castro

1404

F-rich phlogopite stability in ultra-high-temperature metapelites from the Napier Complex, East Antarctica
Y. Motoyoshi and B.J. Hensen

1414

Instability of Al₂SiO₅ “triple-point” assemblages in muscovite+biotite+quartz-bearing metapelites, with implications
David R.M. Pattison

1423

Stability of osumilite coexisting with spinel solid solution in metapelitic granulites at high oxygen fugacity
Kaushik Das, Somnath Dasgupta, and Hiroyuki Miura

1435

Geikielite exsolution in spinel
Eric Reusser, Reto Gieré, and Gregory R. Lumpkin

1447

Aeromagnetic anomalies, magnetic petrology and rock magnetism of hemo-ilmenite- and magnetite-rich cumulate rocks from the Sokndal Region, South Rogaland, Norway
Suzanne A. McEnroe, Peter Robinson, and Peter T. Panish

1469

Minor element chemistry of hemo-ilmenite and magnetite in cumulate rocks from the Sokndal Region, South Rogaland, Norway
Peter Robinson, Peter T. Panish, and Suzanne A. McEnroe

1477

Crystal structure analysis of synthetic Ca₄Fe_1.5Al_17.67O₃₂: A high-pressure, spinel-related phase
V. Kahlenberg, C.S.J. Shaw, and J.B. Parise

1489

Fluoro-edenite from Biancavilla (Catania, Sicily, Italy): Crystal chemistry of a new amphibole end-member
Antonio Gianfagna and Roberta Oberti

1506

The crystal structure of low melanophlogite
Takeshi Nakagawa, Kuniaki Kihara, and Kazuo Harada

1534

NEW MINERAL NAMES
John L. Jambor and Andrew C. Roberts

1538

AUTHOR INDEX

1545

SUBJECT INDEX