American Mineralogist, 2003, V 88, N 2-3, February-March.

LETTERS

464 
Ultrapotassic clinopyroxene from the Kumdy-Kol microdiamond mine, Kokchetav 
Complex, Kazakhstan: Occurrence, composition and crystal-chemical characterization
Luca Bindi, Oleg G. Safonov, Vasily O. Yapaskurt, Leonid L. Perchuk,
and Silvio Menchetti

469 
Determination of planetary basalt parentage: A simple technique using the 
electron microprobe
J.J. Papike, J.M, Karner, and C.K. Shearer

ARTICLES

257 
Structure, metal-insulator transitions, and magnetic properties of FeO
at high pressures
Stephen A. Gramsch, Ronald E. Cohen, and Sergej Yu Savrasov

262 
The high-temperature behavior of defect hydrogen species in quartz:
Implications for hydrogen isotope studies
Kevin Grant, Sarah A. Gleeson, and Steve Roberts

271 
Thermal stability and vibrational spectra of the sheet borate tuzlaite, 
NaCa[B5O8(OH)2]3H2O
Vladimir Bermanec, Kresimir Furic, Masa Rajic, and Goran Kniewald

277 
Hydrogen-bonded water in laumontite I: X-ray powder diffraction study of water 
site occupancy and structural changes in laumontite during room-temperature 
isothermal hydration/dehydration
Thra'inn Fridriksson, David L. Bish, and Dennis K. Bird

288 
In-situ determination of mineral solubilities in fluids using a hydrothermal 
diamond-anvil cell and SR-XRF: Solubility of AgCl in water
Christian Schmidt and Karen Rickers

293 
Pressure-induced phase transition in malayaite, CaSnOSiO4
Stephanie Rath, Martin Kunz, and Ronald Miletich

301 
Equation of state of stishovite to lower mantle pressures
Denis Andrault, Ross J. Angel, Jed L. Mosenfelder, and Tristan Le Bihan

308 
Chemical transfer during redox exchanges between H2 and Fe-bearing silicate 
melts
Fabrice Gaillard, Michel Pichavant, Stephen Mackwell, Re'mi Champallier,
Bruno Scaillet, and Catherine McCammon
Abstract

316 
Trace-element partitioning between alkali feldspar and peralkalic quartz 
trachyte to rhyolite magma. Part I: Systematics of trace-element partitioning
John Charles White, Greg S. Holt, Don F. Parker, and Minghua Ren

330 
Trace-element partitioning between alkali feldspar and peralkalic quartz 
trachyte to rhyolite magma. Part II: Empirical equations for calculating trace-
element partition coefficients of large-ion lithophile, high field-strength, and 
rare-earth elements
John Charles White

338 
Four generations of accessory-phase growth in low-pressure migmatites from SW 
New Hampshire
Joseph M. Pyle and Frank S. Spear
    
352
Mineralogy, chemistry, and formation of oxidized biotite in the weathering 
profile of granitic rocks
Gi Young Jeong and Hye Bin Kim

365 
Experimental study of zircon coarsening in quartzite ±H2O at 1.0 GPa and 1000 
°C, with implications for geochronological studies of high-grade metamorphism
John C. Ayers, Katherine DeLaCruz, Calvin Miller, and Oran Switzer

377 
Biotite dissolution processes and mechanisms in the laboratory and in nature: 
Early stage weathering environment andvermiculitization
Takashi Murakami, Satoshi Utsunomiya, Tadashi Yokoyama, and Takeshi Kasama

387 
Fe2+-Mg partitioning between garnet, magnesiowu"stite, and (Mg,Fe)2SiO4 phases 
of the transition zone
Daniel J. Frost

398 
Interlayer structure and dynamics of Cl-bearing hydrotalcite: far infrared 
spectroscopy and molecular dynamics modeling
Jianwei Wang, Andrey G. Kalinichev, James E. Amonette, and R. James Kirkpatrick

410 
Si-Al disorder and solid solutions in analcime, chabazite, and wairakite
Philip S. Neuhoff, Jonathan F. Stebbins, and Dennis K. Bird

424 
Cafetite, Ca[Ti2O5](H2O): Crystal structure and revision of chemical formula
Sergey V. Krivovichev, Victor N. Yakovenchuk, Peter C. Burns, Yakov A. 
Pakhomovsky, and Yury P. Menshikov

430 
Order-disorder approach to calcioaravaipaite, [PbCa2Al(F,OH)9]: The crystal 
structure of the triclinic MDO polytype
Anthony R. Kampf, Stefano Merlino, and Marco Pasero

Deposit Item

436 
initio investigation of the structures of NaOH hydrates and their Na+ and OH- 
coordination polyhedra
James R. Rustad, Andrew R. Felmy, Kevin M. Rosso, and Eric J. Bylaska

450 
Another step toward understanding the true nature of sartorite: Determination 
and refinement of a ninefold superstructure
Peter Berlepsch, Thomas Armbruster, Emil Makovicky, and Dan Topa

Deposit Item
462 
Isotypism of Co(H2O)6[Sb(OH)6]2 with brandholzite and bottinoite
Alexandra Friedrich, Fiorenzo Mazzi, Manfred Wildner, and Ekkehart Tillmanns

473 
Real-time AFM diagrams on your Macintosh
Frank S. Spear

474 
Three-dimensional model of heat flow in the aureole of the Marcy anorthosite, 
Adirondack Highlands, New York: Implications for depth of emplacement
J. Alcock, Kevin Myer, and P. D. Muller

475 
NEW MINERAL NAMES
John L. Jambor, and Andrew C. Roberts

480 
BOOK REVIEW
ALKALINE ROCKS AND CARBONATITES OF THE WORLD, PART 3: AFRICA. by A.R. Woolley, 
2001. The Geological Society Publishing House, Bath, U.K., 372 p.
Robert Gault