American Mineralogist, 1998, V 83, N 7-8, July-August.

An International Journal of Earth and Planetary Materials.

LETTERS

E.A. Mathez and D.M. Mogk
Characterization of carbon compounds on a pyroxene surface from a gabbro
xenolith in basalt by time-of-flight secondary ion mass spectrometry 
918

Toshihiro Kogure and Jillian F. Banfield
Direct identification of the six polytypes of chlorite characterized by
semi-random stacking
925

Guy L. Hovis, Jacques Roux, and Pascal Richet
A new era in hydrofluoric acid solution calorimetry: Reduction of required
sample size below 10 milligrams 
931



ARTICLES

Ben Hanson and John H. Jones
The systematics of Cr3+ and Cr2+ partitioning between olivine and liquid in
the presence of spinel 
669

James E. Mungall, Claudia Romano, and Donald B. Dingwell
Multicomponent diffusion in the molten system K2O-Na2O-Al2O3-SiO2-H2O 
685

D.K. Moore, D.J. Cherniak, and E.B. Watson
Oxygen diffusion in rutile from 750 to 1000 _C and 0.1 to 1000 MPa 
700

Dimitrios Xirouchakis and Donald H. Lindsley
Equilibria among titanite, hedenbergite, fayalite, quartz, ilmenite, and
magnetite: Experiments and internally consistent thermodynamic data for
titanite 
712

Deposit item

Joseph V. Chernosky Jr., Robert G. Berman, and David M. Jenkins
The stability of tremolite: New experimental data and a thermodynamic
assessment 
726

M.A. Mercy, Peter A. Rock, William H. Casey, and Mehdi M. Mokarram
Gibbs energies of formation for hydrocerussite [Pb(Oh)2_(PbCO3)2(s)] and
hydrozincite {[Zn(OH)2]3_(ZnCO3)2(s)} at 298 K and 1 bar from
electrochemical cell measurements 
739

R.T. Wilkin and H.L. Barnes
Solubility and stability of zeolites in aqueous solution: I. Analcime, Na-,
and K-clinoptilolite 
746

Javier Cuadros and Stephen P. Altaner
Characterization of mixed-layer illite-smectite from bentonites using
microscopic, chemical and X-ray methods: Constraints on the
smectite-to-illite transformation mechanism 
762

Maria Franca Brigatti, Paola Frigieri and Luciano Poppi
Crystal chemistry of Mg-, Fe-bearing muscovites-2M1
775

Deposit items

V. Baron, J. Gutzmer, H. Rundlof, and R. Tellgren
The influence of iron substitution on the magnetic properties of
hausmannite, Mn2+(Fe,Mn)3+2O4 
786

David P. Dobson, Neil S. Cohen, Quentin A. Pankhurst, and John P. Brodholt
A convenient method for measuring ferric iron in magnesiowustite
(MgO-Fe1-xO) 
794

Dawn E. Janney and Jillian F. Banfield
Distribution of cations and vacancies and the structure of defects in
oxidized intermediate olivine by atomic-resolution TEM and image simulation
799

Ekhard K.H. Salje, Andrew Buckley, Gustaaf Van Tendeloo, Yoshihiro
Ishibashi, and Gordon L. Nord Jr.
Needle twins and right-angled twins in minerals: Comparison between
experiment and theory 
811

Nikolay Zotov and Hans Keppler
The influence of water on the structure of hydrous sodium tetrasilicate
glasses
823

George Amthauer and George R. Rossman
They hydrous component in andradite garnet
835

Tracey Chaplin, G. David Price, and Nancy L. Ross
Computer simulation of the infrared and Raman activity of pyrope garnet,
and assignment of calculated modes to specific atomic motions
841

M. Darby Dyar, Marjorie E. Taylor, Timothy M. Lutz, Carl A. Francis,
Charles V. Guidotti, and Micheal Wise
Inclusive chemical characterization of tourmaline: Mossbauer study of Fe
valence and site occupancy 
848

Steven I. Boldish and William B. White
Optical band gaps of selected ternary sulfide minerals
865

Heribert Graetsch
Characterization of the high-temperature modifications of
incommensuratetridymite L3-To(MX-1) from 25 to 250 _C 
865

Max W. Schmidt, Larry W. Finger, Ross J. Angel, and Robert E. Dinnebier
Synthesis, crystal structure, and phase relations of AlSiO3OH, a
high-pressure hydrous phase 
881

Marjorie D. Medrano, Howard T. Evans Jr., Hans-Rudolf Wenk, and David Z.
Piper
Phosphovanadylite: A new vanadium phosphate mineral with a zeolite-type
structure 
889

Deposit items

Julie B. Selway, Milan Novak, Frank C. Hawthorne, Petr Cerny, Luisa
Ottolini, and T. Kurtis Kyser
Rossmanite box(LiAl2)Al6(Si6O18)(BO3)3(OH)4, a new alkali-deficient
tourmaline: Description and crystal structure 
896

Deposit items

Andrei Y. Barkov, Kauko V.O. Laajoki, Stanislav S. Gornostayev, Yakov A.
Pakhomovskii, and Yuri P. MenÃshikov
Sorosite, Cu(Sn,Sb), a new mineral from the Baimka placer deposit, western
Chukotka, Russian Far East 
901

New Mineral Names 907

Recommended nomenclature for zeolite minerals: Report of the subcommittee
on zeolites of the International Mineralogical Association, Commission on
New Minerals and Mineral Names.