American

Mineralogist

1995, Volume 80, September-October, number 9-10

LETTERS

1085 PAUL H. WARREN Extrapolated partial molar densities of S03, P2O5, and other oxides in silicate melts

LAURENCE GALOISY, GEORGES CALAS, GORDON E. BROWN, JR. Intracrystalline distribution of Ni in San Carlos olivine: An EXAFS study

ARTICLES

873 DIEN LI, G. M. BANCROFT, M. E. FLEET, P. C. HESS, Z. F. YIN Coordination of B in K2O-SiO2-B2O3-P2O5 glasses using B K-edge XANES

878 ANNA M. GEORGE, JONATHAN F. STEBBINS High-temperature 23Na MAS NMR data for albite: Comparison to chemical-shift models

885 ROBERTA L. MILLARD, RONALD C. PETERSON, BRIAN K. HUNTER Study of the cubic to tetragonal transition in Mg2TiO4 and Zn2TiO4 spinels by 17O MAS NMR and Rietveld refinement of X-ray diffraction data

897 HUIFANG XU, DAVID R. VEBLEN, YIQIANG ZHANG Structural modulation and phase transition in a Na-rich alkali feldspar

907 MARIO TRIBAUDINO, PIERA BENNA, EMILIANO BRUNO I1-I2/c phase transition in alkaline-earth feldspars: Evidence from TEM observations of Sr-rich feldspars along the CaAl2Si2O8- SrAl2Si2O8 join

916 HEXIONG YANG, MARC M. HIRSCHMANN Crystal structure of P21/m ferromagnesian amphibole and the role of cation ordering and composition in the P21/m-C2/m transition in cummingtonite

923 M. CHIARA DOMENEGHETTI, G. MARIO MOLIN, MARILENA STIMPFL, MARIO TRIBAUDINO Orthopyroxene from the Serra de MagŽ meteorite: Structure refinement and estimation of C2/c pyroxene contributions to apparent Pbca diffraction violations

930 STEPHEN B. RICE Transmission electron microscope observations of planar defects in ferrierite from Kamloops Lake, British Columbia

937 ROBERT T. DOWNS, ROBERT M. HAZEN, LARRY W. FINGER, TIBOR GASPARIK Crystal chemistry of lead aluminosilicate hollandite: A new high-pressure synthetic phase with octahedral Si

941 TZY-CHUNG WU, ANDY H. SHEN, MAURA S. WEATHERS, WILLIAM A. BASSETT, I-MING CHOU Anisotropic thermal expansion of calcite at high pressures: An in situ X-ray diffraction study in a hydrothermal diamond-anvil cell

947 SUSAN J. GAFFEY H2O and OH in echinoid calcite: A spectroscopic study

960 ALISTAIR R. LENNIE, KATHARINE E. R. ENGLAND, DAVID J. VAUGHAN Transformation of synthetic mackinawite to hexagonal pyrrhotite: A kinetic study

968 DOMINIQUE LATTARD Experimental evidence for the exsolution of ilmenite from titaniferous spinel

982 JOHN D. CLEMENS Phlogopite stability in the silica-saturated portion of the system KAlO2-MgO-SiO2-H2O: New data and a reappraisal of phase relations to 1.5 GPa

998 ALISON R. PAWLEY, BERNARD J. WOOD The high-pressure stability of talc and 10  phase: Potential storage sites for H2O in subduction zones

1004 MARTHA L. GERDES, LUKAS P. BAUMGARTNER, MARK PERSON, DOUGLAS RUMBLE III One- and two-dimensional models of fluid flow and stable isotope exchange at an outcrop in the Adamello contact aureole, Southern Alps, Italy

1020 KATE WRIGHT, ROBERT FREER, C.R.A. CATLOW Oxygen diffusion in grossular and some geological implications

1026 THEODORE C. LABOTKA Evidence for immiscibility in a Ti-rich garnet in calc-silicate hornfels from northeastern Minnesota

1031 STEFANO SALVI, ANTHONY E. WILLIAMS-JONES Zirconosilicate phase relations in the Strange Lake (Lac Brisson) pluton, Quebec-Labrador, Canada

1041 SHOJI ARAI, NATSUE ABE Reaction of orthopyroxene in peridotite xenoliths with alkali-basalt melt and its implication for genesis of alpine-type chromitite

1048 ALEY EL-DIN K. EL-SHAZLY On the thermodynamic data of kaolinite

1054 P. BONAZZI, D. BORRINI, F. MAZZI, F. OLMI Crystal structure and twinning of Sb2AsS2, the synthetic analogue of paŠkkšnenite

1059 JOEL D. GRICE, ROBERT A. GAULT, GEORGE Y. CHAO Reederite-(Y), a new sodium rare-earth carbonate mineral with a unique fluorosulfate anion

1065 DAN HOLTSTAM, ROLF NORRESTAM, ARNE SJ…DIN Plumboferrite: New mineralogical data and atomic arrangement

1073 NEW MINERAL NAMES 1078 ERRATUM AND ADDENDUM

MEMORIALS

1079 MICHAEL L. WILLIAMS Memorial of Jeffrey A. Grambling, 1953-1993

1082 F. A. FREY, T. L. GROVE Memorial of Roger C. Burns, 1937-1994