AMERICAN MINERALOGIST, 1997, V82, N5-6.

            
            LETTERS

 Bernard W. Evans and Bruno Scaillet
 The redox state of pinatubo dacite and the ilmenite-hematite 
 solvus                                                     P. 625

 J.J. Papike, M.N. Spilde, C.T. Adcock, G.W. Fowler, and C.K. Shearer
 Trace elements fractionation by impact-induced volatilization: 
 SIMS study of lunar HASP samples                           P. 630

 B.B. Karki, L. Stixrude, S.J. Clark, M.C. Warren, G.J. Ackland and J. Crain
 Elastic properties of orthorhombic MgSiO3 perovskite at lower 
 mantle pressures                                           P. 635

 Jennifer A. Linton, Yingwei Fei, and Alexandra Navrotsky
 Complete Fe-Mg solid solution in lithium niobate and perovskite
 structures in titanates at high pressures and temperatures P. 639

 Lin-gun Liu and Chung-Cherng Lin
 A calcite ->aragonite-type phase transition in CdCO3       P. 643

 Robert M. Hazen, Hexiong Yang, and Chares T. Prewitt
 Crystal chemistry of superfluorous phase B (Mg10Si3O14F4): 
 Implications for the role of fluorine in the mantle        P. 647

 Hexiong Yang, Charles T. Prewitt, and Daniel J. Frost
 Crystal structure of the dense hydrous magnesium silicate, 
 Phase D                                                    P. 651

            ARTICLES
 Anatoly B. Belonoshko and Leonid S. Dubrovinsky
 A simulation study of induced failure and recrystallization of a perfect 
 MgO crystal under non-hydrostatic compression:
 Application to melting in the diamond anvil cell           P. 441

 Paola Comodi, Pier Francesco Zanazzi, Stefano Poli, and Max W. Schmidt
 High-pressure behavior of kyanite: Compressibility and structural 
 deformations                                               P. 452

 Max W. Schmidt, Stefano Poli, Paola Comodi, and Pier Francesco Zanazzi
 High-pressure behavior of kyanite: Decomposition of kyanite into 
 stishovite and corundum                                    P. 460

 Hexiong Yang, Robert T. Downs, Larry W. Finger, Robert M. Hazen, and 
 Charles T. Prewitt
 Compressibility and crystal structure of kyanite, Al2SiO5, 
 at high pressure                                           P. 467

 Kurt Leinenweber and John Parise
 Rietveld refinement of Ca2TiSiO6 perovskite                P. 475

 Kenneth J.D. MacKenzie and Richard H. Meinhold
 MAS NMR study of pentacoordinated magnesium in grandidierite P.479

 Hillary A. Thompson, Gordon E. Brown Jr., and George A. Parks
 XAFS spectroscopic study of uranyl coordination in solids and 
 aqueous solution                                           P.483

 Annibale Mottana, Jean-Louis Robert, Augusto Marcelli, Gabriele Giuli, 
 Giancarlo Della Ventura, Eleonora Paris, and Ziyu Wu
 Octahedral versus tetrahedral coordination of Al in synthetic micas determined
 by XANES                                                   P.497

 Gejing Li, Donald R. Peacor, Douglas S. Coombs, and Yosuke Kawachi
 Solid solution in the celadonite family: The new minerals ferroceladonite, 
 K2Fe2+2Fe3+2Si8O20(OH)4, and ferroaluminoceladonite,
 K2Fe2+2Al2Si8O20(OH)4                                      P.503

 John M. Hughes, Erich S. Bloodaxe, John M. Hanchar, and Eugene E. Foord
 Incorporation of rare earth elements in titanite: Stabilization of the A2/a 
 dimorph by creation of antiphase boundaries                P.512

 Ping Yang, Jano Stolz, Thomas Armbruster, and Mickey E. Gunter
 Na, K, Rb and Cs exchange in heulandite single crystals: 
 Diffusion kinetics                                         P.517

 S. Kesson, A.E. Ringwood, W. Hibberson, J. Fitz Gerald, and N. Ware
 Reaction between magnesiowüstite of lower mantle composition and 
 core-forming Fe-Ni alloy at 1-40 Gpa                       P. 526

 Rhian H. Jones and Graham D. Layne
 Minor and trace element partitioning between pyroxene and melt in 
 rapidly cooled chondrules                                  P.534

 Alexandra Navrotsky, Robert L. Putnam, Camilla Winbo, and Erik Rosén
 Thermochemistry of double carbonates in the K2CO3-CaCO3
 system                                                     P.546

 Michael R. Carroll and Jennifer G. Blank
 The solubility of H2O in phonolitic melts                  P.549

 Martin R. Lee and Ian Parsons
 Dislocation formation and albitization in alkali feldspars from the 
 Shap granite                                               P.557

 Charles A. Geiger and Anne Feenstra
 Molar volumes of mixing of almandine-pyrope and almandine-spessartine 
 garnets and the crystal chemistry and thermodynamic-mixing
            properties of the aluminosilicate garnets       P.571

 M.J. Holdaway, Biswajit Mukhopadhyay, M.D. Dyar, C.V. Guidotti, 
 and B.L. Dutrow
 Garnet-biotite geothermometry revised: New Margules parameters and a 
 natural specimen data set from Maine                       P.582

 Terje Holten, Bjørn Jamtveit, Paul Meakin, Massimo Cortini, Jon Blundy, 
 and Håkon Austrheim
 Statistical characteristics and origin of 
 oscillatory zoning in crystals                             P.596

 Robert J. Finch and Rodney C. Ewing
 Clarkeite: New chemical and structural data                P.607

            NEW MINERAL NAMES                               P.620

            Book Review                                     P.655