American Mineralogist, 2002, V 87, N 8-9, August-September.


LETTERS

1257 Natural occurrence of Fe2SiO4-spinel in the shocked Umbarger L6 chondrite Zhidong Xie, Naotaka Tomioka, and Thomas G. Sharp 1261 Structural refinements of magnesite at very high pressure Guillaume Fiquet, Fran?ois Guyot, Martin Kunz, Jan Matas, Denis Andrault, and Michael Hanfland
ARTICLES

1029 Evidence for magmatic vapor deposition of anhydrite prior to the 1991 climactic eruption of Mount Pinatubo, Philippines Ryan T. Jakubowski, John Fournelle, Sue Welch, R. J. Swope, and Patrick Camus 1046 Experimental and modeled solubilities of chlorine in aluminosilicate melts, consequences of magma evolution, and implications for exsolution of hydrous chloride melt at Mt. Somma-Vesuvius James D. Webster and Benedetto De Vivo 1062 Temperature-induced Al-zoning in hornblendes of the Fish Canyon magma, Colorado Olivier Bachmann and Michael A. Dungan 1077 Analytical techniques for volatiles: A case study using intermediate (andesitic) glasses P.L. King, T.W. Vennemann, J.R. Holloway, R.L. Hervig, J.B. Lowenstern, and J.F. Forneris 1090 Anomalous optical properties of fibrous tremolite, actinolite, and ferro- actinolite Jennifer R. Verkouteren and Ann G. Wylie 1096 Protoanthophyllite from three metamorphosed serpentinites Hiromi Konishi, Istv?n D?dony, and Peter R. Buseck 1104 Synthesis of beryllian sapphirine in the system MgO-BeO-Al2O3-SiO2-H2O and comparison with naturally occurring beryllian sapphirine and khmaralite. Part 1: Experiments, TEM, and XRD A.G. Christy, Y. Tabira, A. H?lscher, E.S. Grew, and W. Schreyer 1113 Intersite distribution of Fe2+ and Mg in the spinel (sensustricto)-hercynite series by single-crystal X-ray diffraction Giovanni B. Andreozzi and Sergio Lucchesi 1121 Structural relationships in (Mn1-xZnx)Mn2O4 (0 ? x ? 0.26):The "dragging effect" of the tetrahedron on the octahedron Ferdinando Bosi, Sergio Lucchesi, and Antonio Della Giusta 1128 The grid-work texture of authigenic microcrystalline quartz in siliceous crust- type (SCT) mineralized horizons Gianfranco Camana, Daniel Chateigner, Michele Zucali, and Gilberto Artioli 1139 The crystal structure of vicanite-(Ce), a borosilicate showing an unusual (Si3B3O18)15-polyanion Paolo Ballirano, Athos Callegari, Franca Caucia, Adriana Maras, Fiorenzo Mazzi, and Luciano Ungaretti 1144 Submicrometer optical characterization of the grain boundary of optically active Cr3+ doped polycrystalline Al2O3 by near-field spectroscopy Yoshihito Narita and Hiroshi Murotani 1148 High-temperature, high-pressure optical spectroscopic study of ferric-iron- bearing tourmaline Michael N. Taran and George R.Rossman 1154 Infrared and M?ssbauer study of Brazilian tourmalines from different geological environments Ester Figueiredo De Oliveira, Cristiane Casta?eda, Sigrid Griet Eeckhout, Messias Menezes Gilmar, Rog?rio Ribeiro Kwitko, Eddy De Grave, and Nilson Francisquini Botelho 1164 Isothermal compression of staurolite: A single-crystal study Paola Comodi, Michela Montagnoli, Pier Francesco Zanazzi, and Tiziana Boffa Ballaran 1172 Equation of state measurements of chlorite, pyrophyllite, and talc A.R. Pawley, S.M. Clark, and N.J. Chinnery 1183 Structure change of Ca1-xSrxTiO3 perovskite with composition and pressure Takamitsu Yamanaka, Noriyuki Hirai, and Yutaka Komatsu 1190 Mechanism of 2/1- to 3/2-mullite transformation at 1650 °C Martin Schm?cker, Bernd Hildmann, and Hartmut Schneider 1194 High-pressure deformation mechanism in scolecite: A combined computational- experimental study Pietro Ballone, Simona Quartieri, Alessandra Sani, and Giovanna Vezzalini 1207 Far infrared spectra of K+ in dioctahedral and trioctahedral mixed-layer minerals Magali Diaz, Val?rie Laperche, James Harsh, and Ren? Prost 1215 Ab initio quantum mechanical modeling of infrared vibrational frequencies of the OH group in dioctahedral phyllosilicates. Part I: Methods, results and comparison to experimental data Sara Mart?nez-Alonso, James R. Rustad, and Alexander F.H. Goetz 1224 Ab initio quantum mechanical modeling of infrared vibrational frequencies of the OH group in dioctahedral phyllosilicates. Part II: Main physical factors governing the OH vibrations Sara Mart?nez-Alonso, James R.Rustad, and Alexander F.H. Goetz 1235 On geological interpretations of crystal size distributions: Constant vs. proportionate growth D.D. Eberl, Daniel E. Kile, and V.A.Drits 1242 Comments on: Higgins: "Closure in crystal size distributions (CSD), verification of CSD calculations, and the significance of CSD fans" Yucheng Pan 1244 Reply to comment on "Closure in crystal size distributions (CSD), verification of CSD calculations and the significance of CSD fans" Michael D. Higgins 1245 Allabogdanite, (Fe,Ni)2P, a new mineral from the Onello meteorite: The occurrence and crystal structure Sergey N. Britvin, Nikolay S. Rudashevsky, Sergey V. Krivovichev, Peter C. Burns, and Yury S. Polekhovsky 1250 Cristobalite inclusions in the Tatahouine achondrite: Implications for shock conditions Karim Benzerara, Fran?ois Guyot, Jean Alix Barrat, Philippe Gillet, and Maurice Lesourd 1266 New minerals approved in 2001 by the Commission on New Minerals and Mineral Names International Mineralogical Association Joel D. Grice and Giovanni Ferraris 1272 BOOK REVIEW S. A. Morse Rock-forming Minerals VOL. 4A: Framework Silicates: Feldspars. W.A. Deer, R.A. Howie, and J.Zussman. London: The Geological Society, 2001, 972pp.