Influence of Water on the Retention of Organic Probes on Clays Studied by IGC

Henri Balard, Alain Saada, Bernard Siffert and Eugène Papirer 489

Paramagnetic Fe³⁺: A Sensitive Probe for Disorder in Kaolinite

J.-M. Gaite, P. Ermakoff, Th. Allard and J.-P. Muller 496

The Role of Randomly Mixed-Layered Chlorite/Smectite in the Transformation of Smectite to Chlorite

Lori Bettison-Varga and Ian D. R. Mackinnon 506

Comparison of Structural Models of Mixed-Layer Illite/Smectite and Reaction Mechanisms of Smectite Illitization

Stephen P. Altaner and Robert F. Ylagan 517

Effects of Exchanged Cation on the Microporosity of Montmorillonite

David W. Rutherford, Cary T. Chiou and Dennis D. Eberl 534

Crystal Structure Refinement and Mössbauer Spectroscopy of an Ordered, Triclinic Clinochlore

Joseph R. Smyth, M. Darby Dyar, Howard M. May, Owen P. Bricker and James G. Acker 544

Intercalation of Halloysite: A Raman Spectroscopic Study

Ray L. Frost and Janos Kristof 551

An Fe-Berthierine from a Cretaceous Laterite: Part I. Characterization

Thomas A. Toth and Steven J. Fritz 564

An Fe-Berthierine from a Cretaceous Laterite: Part II. Estimation of Eh, pH and pCO₂ Conditions of Formation

Steven J. Fritz and Thomas A. Toth 580

Thermal Analysis as a Tool for Determining and Defining Spherical Kaolinite

F. Javier Huertas, Saverio Fiore and José Linares 587

Conversion of Ferruginous Allophanes to Ferruginous Beidellites at 95 °C under Alkaline Conditions with Alternating Oxidation and Reduction

V. C. Farmer 591

A Critique of Diffuse Double Layer Models Applied to Colloid and Surface Chemistry

Murray B. McBride 598