ARTICLES

Jill Dill Pasteris, Brigitte Wopenka, John J. Freeman, V. Leroy Young, and Harold J. Brandon
Medical mineralogy as a new challenge to the geologist: Silicates in human mammary tissue?   997
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Michael R. Norton and Mickey E. Gunter
Relationships between respiratory diseases and quartz-rich dust in Idaho, U.S.A.    1009
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Laurie E. Bowman, James J. Papike, and Michael N. Spilde
Diogenites as asteroidal cumulates: Insights from spinel chemistry   1020
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Jens Götze, Dirk Habermann, Ulf Kempe, Rolf D. Neuser, and Detlev K. Richter
Cathodoluminescence microscopy and spectroscopy of plagioclases from lunar soil    1027
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Barbara L. Sherriff, David M. Jenkins, Gerald Kunath-Fandrei, Steffen Goetz, and Christian Jäger
²³Na, ²⁹Si, and ⁷¹Ga MAS-NMR spectroscopy of synthetic gallian-fluor-amphiboles    1033
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David A. McKeown, Michael I. Bell, and Edgar S. Etz
Vibrational analysis of the dioctahedral mica: 2M₁ muscovite   1041
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Richard J. Reeder, Geraldine M. Lamble, and Paul A. Northrup
XAFS study of the coordination and local relaxation around Co²⁺, Zn²⁺, Pb²⁺, and Ba²⁺ trace elements in calcite.    1049
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Deposit items

Carrick M. Eggleston
The surface structure of a-Fe₂O₃ (001) by scanning tunneling microscopy: Implications for interfacial electron transfer reactions   1061
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Grigore Simon, Hui Huang, James E. Penner-Hahn, Stephen E. Kesler, and Li-Shun Kao
Oxidation state of gold and arsenic in gold-bearing arsenian pyrite   1071
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Takashi Murakami, Tsutomu Sato, and Atsuyuki Inoue
HRTEM evidence for the process and mechanism of saponite-to-chlorite conversion through corrensite   1080
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David Christopher Noe and David R. Veblen
Incommensurate modulation and the crystal structure of ganophyllite   1088
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Sergey V. Krivovichev and Stanislav K. Filatov
Structural principles for minerals and inorganic compounds containing anion-centered tetrahedra   1099
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E.K.H. Salje, J. Chrosch, and R.C. Ewing
Is "metamictization" of zircon a phase transition?    1107
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Bernhard Bühn, Andrew H. Rankin, Martin Radtke, Martin Haller, and Arndt Knöchel
Burbankite, a (Sr,REE,Na,Ca)-carbonate in fluid inclusions from carbonatite-derived fluids: Identification and characterization using Laser Raman spectroscopy, SEM-EDX, and synchrotron micro-XRF analysis    1117
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Tobias Wüst, Jano Stolz, and Thomas Armbruster
Partially dealuminated heulandite produced by acidic REECl₃ solution: A chemical and single-crystal X-ray study   1126
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Akihiko Nakatsuka, Akira Yoshiasa, Takamitsu Yamanaka, Osamu Ohtaka, Tomoo Katsura, and Eiji Ito
Symmetry change of majorite solid-solution in the system Mg₃Al₂Si₃O₁₂-MgSiO₃    1135
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Elisabetta Meneghinello, Alberto Alberti, and Giuseppe Cruciani
Order-disorder process in the tetrahedral sites of albite   1144
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Donald R. Peacor, Roland C. Rouse, and Edward S. Grew
Crystal structure of boralsilite and its relation to a family of boroaluminosilicates, sillimanite, and andalusite    1152
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Ulrike Troitzsch and David J. Ellis
The synthesis and crystal structure of CaAlFSiO₄, the Al-F analog of titanite    1162
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Laurence A.J. Garvie, Bertrand Devouard, Thomas L. Groy, Fernando Cámara, and Peter R. Buseck
Crystal structure of kanemite, NaHSi₂O₅·3H₂O, from the Aris phonolite, Namibia   1170
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LETTERS

Joachim Gottsmann, Donald B. Dingwell, and Conrad Gennaro
Thermal expansion of silicate liquids: Direct determination using container-based dilatometry    1176
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Vladimir M. Khomenko and Klaus Langer
Aliphatic hydrocarbons in structural channels of cordierite: A first evidence from polarized single-crystal IR-absorption spectroscopy   1181
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R. James Kirkpatrick, Ping Yu, Xiaoqiang Hou, and Yeongkyoo Kim
Interlayer structure, anion dynamics, and phase transitions in mixed-metal layered hydroxides: Variable temperature ³⁵Cl NMR spectroscopy of hydrotalcite and Ca-aluminate hydrate (hydrocalumite)    1186
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Sharon E. Ashbrook, Andrew J. Berry, and Stephen Wimperis
Three- and five-quantum ¹⁷O MAS NMR of forsterite Mg₂SiO₄    1191
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NEW MINERAL NAMES     1195

John L. Jambor, Nikolai N. Pertsev, and Andrew C. Roberts
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PRESENTATION OF AWARDS FOR 1998

John R. Holloway
Presentation of the Roebling Medal of the Mineralogical Society of America for 1998 to C. Wayne Burnham     1199
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C. Wayne Burnham
Acceptance of the Roebling Medal of the Mineralogical Society of America for 1998     1200
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E. Bruce Watson
Presentation of the Mineralogical Society of America Award for 1998 to James M. Brenan     1202
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James Brenan
Acceptance of the Mineralogical Society of America Award for 1998     1203
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Malcom Ross
Presentation of the Distinguished Public Service Medal for 1998 to Daniel E. Appleman    1205
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Peggy Appleman
Acceptance of the Mineralogical Society of America Public Service Award of 1998     1207
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ERRATA     1208

Fanrong Chen, Rodney C. Ewing and Sue B. Clark
The Gibbs free energies and enthalpies of formation of U⁶⁺ phases: An empirical method of prediction (v. 84, 650-664,1999).
Abstract of Referenced Article
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BOOK REVIEWS     1209

E.E. Foord And J.T. O'Connor
Boron: Mineralogy, Petrology and Geochemistry. edited by E.S. Grew and L.M. Anovitz. Minerlaogical Society of America Reviews in Mineralogy, Vol. 33, 1996.
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Allen F. Glazner
Third Hutton Symposium: The Origin of Granites and Related Rocks. Edited by M. Brown, P.A. Candela, D.L. Peck, W.E. Stephens, R.J. Walker, and E. Zen. Geological Society of America Special Paper 315, 1996.
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MEMORIAL

Nikolai N. Pertsev
Memorial of Dimitriy Sergeyevich Korzhinskiy on the centenary of his birth, 1899-1985    1212
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