Preface to the Foord Issue   693

David London
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Wallace D. Kleck and Eugene E. Foord
The chemistry, mineralogy, and petrology of the George Ashley Block pegmatite body    695
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Karen L. Webber, William B. Simmons, Alexander U. Falster, and Eugene E. Foord
Cooling rates and crystallization dynamics of shallow level pegmatite-aplite dikes, San Diego County, California   708
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Daniel E. Kile and and D.D. Eberl
Crystal growth mechanisms in miarolitic cavities in the Lake George ring complex and vicinity, Colorado   718
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Don R. Baker and Carmela Freda
Ising models of undercooled binary system crystallization: Comparison with experimental and pegmatite textures    725
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Joseph M. Evensen, David London, and Richard F. Wendlandt
Solubility and stability of beryl in granitic melts    733
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John R. Smerekanicz and Francis Ö. Dudás
Reconnaissance fluid inclusion study of the Morefield pegmatite, Amelia County, Virginia    746
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Petr Cerny, Ron Chapman, William B. Simmons, and Leonard E. Chackowsky
Niobian rutile from the McGuire granitic pegmatite, Park County, Colorado: Solid solution, exsolution, and oxidation   754
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Mark A. Cooper, Frank C. Hawthorne, and Edward S. Grew
The crystal chemistry of sogdianite, a milarite-group mineral   764
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Deposit items

Eugene E. Foord, Joseph T. O'Connor, John M. Hughes, Stephen J. Sutley, Alexander U. Falster, Arthur E. Soregaroli, Frederick E. Lichte, and Daniel R. Kile
Simmonsite, Na₂LiAlF₆, a new mineral from the Zapot amazonite-topaz-zinnwaldite pegmatite, Hawthorne, Nevada, U.S.A.   769
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Miguel Angel Galliski, Petr Cerny´, María Florencia Márquez-Zavalía, and Ron Chapman
Ferrotitanowodginite, Fe²⁺TiTa₂O₈, a new mineral of the wodginite group from the San Elías pegmatite, San Luis, Argentina   773
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Frank C. Hawthorne, David K. Teertstra, and Petr Cerný
Crystal-structure refinement of a rubidian cesian phlogopite   778
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F. Pezzotta, V. Diella, and A. Guastoni
Chemical and paragenetic data on gadolinite-group minerals from Baveno and Cuasso al Monte, southern Alps, Italy   782
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William B. Simmons and Karen L. Webber
Memorial of Eugene Edward Foord, 1946-1998    790
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ARTICLES

Barbara L. Dutrow, C.T. Foster Jr., and Darrell J. Henry
Tourmaline-rich pseudomorphs in sillimanite zone metapelites: Demarcation of an infiltration front    794
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John W. Shervais and James J. McGee
KREEP cumulates in the western lunar highlands: Ion and electron microprobe study of alkali-suite anorthosites and norites from Apollo 12 and 14    806
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(Contents continued on outside back cover)

(Contents continued from front cover)

B.L. Jolliff, C. Floss, I.S. McCallum, and J.M. Schwartz
Geochemistry, petrology, and cooling history of 14161,7373: A plutonic lunar sample with textural evidence of granitic-fraction separation by silicate-liquid immiscibility   821
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Wim van Westrenen, Jon Blundy, and Bernard Wood
Crystal-chemical controls on trace element partitioning between garnet and anhydrous silicate melt    838
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Laurent Thiéblot, Christophe Téqui, and Pascal Richet
High-temperature heat capacity of grossular (Ca₃Al₂Si₃O₁₂), enstatite (MgSiO₃), and titanite (CaTiSiO₅)   848
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Guillaume Fiquet and Bruno Reynard
High-pressure equation of state of magnesite: New data and a reappraisal   856
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Jianzhong Zhang and Richard J. Reeder
Comparative compressibilities of calcite-structure carbonates: Deviations from empirical relations    861
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R. Lee Penn and Jillian F. Banfield
Formation of rutile nuclei at anatase {112} twin interfaces and the phase transformation mechanism in nanocrystalline titania   871
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J.A. Tossell
Theoretical studies on the formation of mercury complexes in solution and the dissolution and reactions of cinnabar   877
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John Rakovan, Udo Becker, and Michael F. Hochella Jr.
Aspects of goethite surface microtopography,
structure, chemistry, and reactivity   884
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Alessandro F. Gualtieri and Paolo Venturelli
In situ study of the goethite-hematite phase
transformation by real time synchrotron powder diffraction    895
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Alessandro Pavese, Gilberto Artioli, and Steve Hull
In situ powder neutron diffraction of cation partitioning vs. pressure in Mg_0.94Al_2.04O₄ synthetic spinel    905
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Roberta Oberti, Luisa Ottolini, Fernando Camara, and Giancarlo Della Ventura
Crystal structure of non-metamict Th-rich hellandite-(Ce) from Latium (Italy) and crystal chemistry of the hellandite-group minerals   913
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Erich S. Bloodaxe, John M. Hughes, M. Darby Dyar, Edward S. Grew, and Charles V. Guidotti
Linking structure and chemistry in the schorl-dravite series   922
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Hexiong Yang and Charles T. Prewitt
On the crystal structure of pseudowollastonite (CaSiO₃)   929
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Gabriele Giuli, Paola Bonazzi, and Silvio Menchetti
Al-Fe disorder in synthetic epidotes: A single-crystal X-ray diffraction study   933
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Sung Keun Lee and Jonathan F. Stebbins
The degree of aluminum avoidance in aluminosilicate glasses   937
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Laurence A.J. Garvie and Peter R. Buseck
Bonding in silicates: Investigation of the Si L_2,3 edge by parallel electron energy-loss spectroscopy    946
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C.J. Rossouw and P.R. Miller
Location of interstitial Cr in mullite by incoherent channeling patterns from characteristic X-ray emission   965
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David A. McKeown, Michael I. Bell, and Edgar S. Etz
Raman spectra and vibrational analysis of the trioctahedral mica phlogopite    970
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Diederik Visser, Timo G. Nijland, Dick J. Lieftink, and Cees Maijer
The occurrence of preiswerkite in a tourmaline-biotite-scapolite rock from Blengsvatn, Norway    977
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LETTERS

Jonathan F. Stebbins, Sung Keun Lee, and Jane V. Oglesby
Al-O-Al oxygen sites in crystalline aluminates and aluminosilicate glasses: High-resolution oxygen-17 NMR results   983
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R.M. Hazen, H. Yang, L.W. Finger, and B.A. Fursenko
Crystal chemistry of high-pressure BaSi₄O₉ in the trigonal (P3) barium tetragermanate structure   987
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NEW MINERAL NAMES 990

John L. Jambor and Andrew C. Roberts
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SOFTWARE REVIEW   995

George Harlow
THE PHOTO ATLAS OF MINERALS. Gem and Mineral Council, Los Angeles County Museum of Natural History.
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