ARTICLES

William D. Carlson, Raymond A. Donelick, and Richard A. Ketcham
Variability of apatite fission-track annealing kinetics: I. Experimental results   1213
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Raymond A. Donelick, Richard A. Ketcham, and William D. Carlson
Variability of apatite fission-track annealing kinetics: II. Crystallographic orientation effects    1224
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Richard A. Ketcham, Raymond A. Donelick, and William D. Carlson
Variability of apatite fission-track annealing kinetics: III. Extrapolation to geological time scales    1235
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Peter I. Nabelek
Trace element distribution among rock-forming minerals in Black Hills migmatites, South Dakota: A case for solid-state equilibrium    1256
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Antonio Sanchez-Navas
Sequential kinetics of a muscovite-out reaction: A natural example   1270
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David P. Moecher and Zachary D. Sharp
Comparison of conventional and garnet-aluminosilicate-quartz O isotope thermometry: Insights for mineral equilibration in metamorphic rocks   1287
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Anurag Sharma and David M. Jenkins
Hydrothermal synthesis of amphiboles along the tremolite-pargasite join and in the ternary system tremolite-pargasite-cummingtonite    1304
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L.Y. Aranovich and R.C. Newton
Experimental determination of CO₂-H₂O activity-composition relations at 600-1000 °C and 6-14 kbar by reversed decarbonation and dehydration reactions   1319
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Jürgen Truckenbrodt and Wilhelm Johannes
H₂O loss during piston-cylinder experiments    1333
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B.O. Mysen, F. Holtz, M. Pichavant, J.-M. Beny, and J.-M. Montel
The effect of temperature and bulk composition on the solution mechanism of phosphorus in peraluminous haplogranitic magma   1336
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Delores M. Robinson and Calvin F. Miller
Record of magma chamber processes preserved in accessory mineral assemblages, Aztec Wash pluton, Nevada   1346
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Christine Floss
Fe,Mg,Mn-bearing phosphates in the GRA 95209 meteorite: Occurrences and mineral chemistry    1354
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Hongwu Xu, Peter J. Heaney, Alexandra Navrotsky, Letitia Topor, and Jun Liu
Thermochemistry of stuffed quartz-derivative phases along the join LiAlSiO₄-SiO₂   1360
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Mark S. Ghiorso, Hexiong Yang, and Robert M. Hazen
Thermodynamics of cation ordering in karrooite (MgTi₂O₅)   1370
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Y. Shibue
Calculations of fluid-ternary solid solution equilibria: An application of the Wilson equation to fluid-(Fe,Mn,Mg)TiO₃ equilibria at 600 °C and 1 kbar    1375
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Robert A. Fellows, Alistair R. Lennie, Andreas W. Munz, David J. Vaughan, and Geoff Thornton
Structures of FeTiO₃ (0001) surfaces observed by scanning tunneling microscopy   1384
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Diana K. Fisler and Randall T. Cygan
Diffusion of Ca and Mg in calcite   1392
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Rolf Heinemann, Veronika Staack, Arne Fischer, Herbert Kroll, Thomas Vad, and Armin Kirfel
Temperature dependence of Fe,Mg partitioning in Acapulco olivine    1400
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R.M. Wilson, J.C. Elliott, and S.E.P. Dowker
Rietveld refinement of the crystallographic structure of human dental enamel apatites    1406
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Stephen Guggenheim and Wudi Zhan
Crystal structures of two partially dehydrated chlorites: The "modified" chlorite structure   1415
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Anne Bosenick, Charles A. Geiger, and Brian L. Phillips
Local Ca-Mg distribution of Mg-rich pyrope-grossular garnets synthesized at different temperatures revealed by ²⁹Si MAS NMR spectroscopy    1422
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Søren K. Lausen, Holger Lindgreen, Hans J. Jakobsen, and Niels C. Nielsen
Solid-state ²⁹Si MAS NMR studies of illite and illite-smectite from shale   1433
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Petr Ondrus, Roman Skála, Cecilia Viti, Frantisek Veselovský, Frantisek Novák, and Jirí Jansa
Parascorodite, FeAsO₄·2H₂O - a new mineral from Kank near Kutná Hora, Czech Republic    1439
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G. Artioli and E. Galli
Gonnardite: Re-examination of holotype material and discreditation of tetranatrolite   1445
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LETTERS

S.L. Tagg, Herman Cho, M. Darby Dyar, and Edward S. Grew
Tetrahedral boron in naturally occurring tourmaline    1451
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Peter C. Burns and Robert J. Finch
Wyartite: Crystallographic evidence for the first pentavalent-uranium mineral   1456
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Reinhard Wulf, George Calas, Aline Ramos, Heinz Büttner, Knut Roselieb, and Matthias Rosenhauer
Structural environment of krypton dissolved in vitreous silica   1461
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NEW MINERAL NAMES   1464

John L. Jambor and Andrew C. Roberts
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ERRATUM   1468

N. Tomioka and K. Fujino
Akimotoite, (Mg,Fe)SiO₃, a new silicate mineral of the ilmenite group in the Tenham chondrite
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Abstract of Referenced Article