1573

PRESIDENTIAL ADDRESS: Patterns of mineral occurrence in metamorphic rocks
John M. Ferry

1830

Structure type and bulk modulus of Fe₃S, a new iron-sulfur compound
Yingwei Fei, Jie Li, Constance M. Bertka, and Charles T. Prewitt

1834

Single crystal elasticity of lawsonite
Stanislav V. Sinogeikin, Frank R. Schilling, and Jay D. Bass

1838

In situ measurement of viscosity of liquids in the Fe-FeS system at high pressures and temperatures
David P. Dobson, Wilson A. Crichton, Lidunka Vocadlo, Adrian P. Jones, Yanbin Wang, Takeyuki Uchida, Mark Rivers, Stephen Sutton, and John P. Brodholt

1589

A double magmatic heat pump at the core-mantle boundary
S.A. Morse

1595

High-temperature contact metamorphism of calc-silicate xenoliths in the Kiglapait Intrusion, Labrador
Brent E. Owens

1606

Multiple pyroxene and amphibole assemblages in the amphibolite facies: Bulk compositional controls
Wolf-Achim Kahl and John C. Schumacher

1617

Margarite-corundum phyllites from the Appalachian orogen of South Carolina: Mineralogy and metamorphic history
William A. Ranson

1625

Continuous metamorphic gradient documented by graphitization and K-Ar age, southeast Otago, New Zealand
Yujiro Nishimura, Douglas S. Coombs, Charles A. Landis, and Tetsumaru Itaya

1637

Kyanite eclogite thermobarometry and evidence for thrusting of UHP over HP metamorphic rocks, Nord??yane, Western Gneiss Region, Norway
Michael P. Terry, Peter Robinson, and Erling J. Krogh Ravna

1651

Monazite geochronology of UHP and HP metamorphism, deformation, and exhumation, Nord??yane, Western Gneiss Region, Norway
Michael P. Terry, Peter Robinson, Michael A. Hamilton, and Michael J. Jercinovic

1665

Solubilities of noble metals in Fe-containing silicate melts as derived from experiments in Fe-free systems
Alexander Borisov and Herbert Palme

1674

Water speciation in silicate glasses and melts: Langmuir limited site model
Robert H. Doremus

1681

The ab initio study of the stability of low temperature Al/Si ordered albite, NaAlSi₃O₈
Steven D. Kenny, J. Desmond C. McConnell, and Keith Refson

1686

The heat capacity of MgCr₂O₄, FeCr₂O₄, and Cr₂O₃ at low temperatures and derived thermodynamic properties
Stephan Klemme, Hugh St.C. O’Neill, Walter Schnelle, and Eberhard Gmelin

1694

Thermodynamics of the R3 to R3c phase transition in the ilmenite-hematite solid solution
Richard J. Harrison, Udo Becker, and Simon A.T. Redfern

1706

An ab initio study of hydrogarnets
R.H. Nobes, E.V. Akhmatskaya, V. Milman, J.A. White, B. Winkler, and C.J. Pickard

1716

Short-range order in synthetic aluminous tremolites: An infrared and triple-quantum MAS NMR study
Frank C. Hawthorne, Mark D. Welch, Giancarlo Della Ventura, Shuangxi Liu, Jean-Louis Robert, and David M. Jenkins

1725

In-situ Raman spectroscopy of quartz: A pressure sensor for hydrothermal diamond-anvil cell experiments at elevated temperatures
Christian Schmidt and Martin A. Ziemann

1735

Modification of the hydroxyl surface of potassium acetate intercalated halloysite between 25 and 300 °C
Ray L. Frost, Janos Kristof, Eva Mako, and J. Theo Kloprogge

1744

On the occurrence of anomalous fission tracks in apatite and titanite
Raymond C. Jonckheere and Günther A. Wagner

1754

Reactivity of surface sites on fractured arsenopyrite (FeAsS) toward oxygen
Andrea G. Schaufuss, H. Wayne Nesbitt, Michael J. Scaini, Hartmut Hoechst, Michael G. Bancroft, and Rüdiger Szargan

1767

Surface area and porosity of primary silicate minerals
Susan L. Brantley and Nathan P. Mellott

1784

Charge contrast imaging of geological materials in the environmental scanning electron microscope
Gordon R. Watt, Brendan J. Griffin, and Peter D. Kinny

1795

Chemical fine structure of Franciscan jadeitic pyroxene from Ward Creek, Cazadero area, California
Shohei Banno, Hidehiko Shibakusa, Masaki Enami, Chang-lung Wang, and W.G. Ernst

1799

Crystal structure of CaMg₂Al₆O₁₂, a new Al-rich high pressure form
Hiroyuki Miura, Yoichi Hamada, Toshihiro Suzuki, Masaki Akaogi, Nobuyoshi Miyajima, and Kiyoshi Fujino

1804

The crystal structure of “Tetragonal Almandine-Pyrope Phase” (TAPP): A reexamination
Larry W. Finger and Pamela G. Conrad

1808

The crystal structure of tetranatrolite from Mont Saint-Hilaire, Québec, and its chemical and structural relationship to paranatrolite and gonnardite
Howard T. Evans Jr., Judith A. Konnert, and Malcolm Ross

1816

Elyite, Pb₄Cu(SO₄)O₂(OH)₄·H₂O: Crystal structure and new data
Uwe Kolitsch and Gerald Giester

1822

Dukeite, Bi³⁺₂₄Cr⁶⁺₈O₅₇(OH)₆·(H₂O)₃, a new mineral from Brejaába, Minas Gerais, Brazil: Description and crystal structure
Peter C. Burns, Andrew C. Roberts, John A.R. Stirling, Alan J. Criddle, and Mark N. Feinglos

1828

Pseudosinhalite is a structural isotype of chondrodite
Hugo Strunz and Ernest H. Nickel

1843

NEW MINERAL NAMES
John L. Jambor, Jacek Puziewicz and Andrew C. Roberts

1848

Memorial of Arthur Montgomery, 1909-1999
Rodney C. Ewing

1851

AUTHOR INDEX

1859

SUBJECT INDEX

1686

The heat capacity of MgCr₂O₄, FeCr₂O₄, and Cr₂O₃ at low temperatures and derived thermodynamic properties
Stephan Klemme, Hugh St.C. O’Neill, Walter Schnelle, and Eberhard Gmelin

1808

The crystal structure of tetranatrolite from Mont Saint-Hilaire, Québec, and its chemical and structural relationship to paranatrolite and gonnardite
Howard T. Evans Jr., Judith A. Konnert, and Malcolm Ross

1816

Elyite, Pb₄Cu(SO₄)O₂(OH)₄·H₂O: Crystal structure and new data
Uwe Kolitsch and Gerald Giester