The Clay Minerals Society

Clays and Clay Minerals¨

Volume 44 Number 2 April 1996

Contents

K Transfer During Burial Diagenesis in the Mahakam Delta Basin (Kalimantan, Indonesia)
Sylvie Furlan, Norbert Clauer, Sam Chadhuri, and Frédéric Sommer 157

Interaction of Trialkyl Phosphites with Montmorillonites
G. Dios Cancela, E. Romero Taboada, F.J. Huertas, A. Hernández Laguna, and F. Sánchez Rasero 170

Structural Transformations of Interstratified Illite-Smectites from Dolná Ves Hydrothermal Deposits: Dynamics and Mechanisms
V.A. Drits, A.L. Salyn, and V. Sucha 181

Why Does Halloysite Roll?— A New Model
Balbir Singh 191

Study of a Commercial SiO2 Sol and Gel by Small Angle X-ray Scattering: Effect of Sample Thickness and Interpretation by Means of Smoluchowski Scheme
Yingnian Xu, Pang L. Hiew, Matthew Akira Klippenstein, and Yoshikata Koga 197

57Fe Mössbauer Effect Study of Al-Substituted Lepidocrocites
E. De Grave, G. M. da Costa, L. H. Bowen, U. Schwertmann, and R. E. Vandenberghe 214

Sorption Mechanisms of Lanthanum on Oxide Minerals
Scott Fendorf and Mark Fendorf 220

Dissolution of Hectorite in Inorganic Acids
P. Komadel, J. Madejová, M. Janek. W. P. Gates, R. J. Kirkpatrick, and J. W. Stucki 228

Study of Nanocomposites Obtained by Carbonization of Different Organic Precursors within Taeniolite Matrices
Teresa J. Bandosz, Karol Putyera, Jacek Jagiello, and James A. Schwarz 237

Weathering of Chlorite in a Quartz-Chlorite Schist: I. Mineralogical and Chemical Changes
Takashi Murakami, Hiroshi Isobe, Tsutomu Sato, and Toshihiko Ohnuki 244

TEM Observations of Coherent Stacking Relations in Smectite, I/S and Illite of Shales: Evidence for McEwan Crystallites and Dominance of 2M1 Polytypism
Hailiang Dong and Donald R. Peacor 257

Exchange Reactions in the Ca-Mg-Na-Montmorillionite System
Giora Rytwo, Amos Banin, and Shlomo Nir 276

Goethite Dispersibility in Solutions of Variable Ionic Strength and Soluble Organic Matter Content
A. C. Herrera Ramos and M. B. McBride 286