Berthierine from the Lower Cretaceous Clearwater Formation, Alberta, Canada

Edward R. C. Hornibrook and Frederick J. Longstaffe 1

 Hematite and Goethite from Duricrusts Developed by Lateritic Chemical Weathering of Precambrian Banded Iron Formations, Minas Gerais, Brazil

E. Ramanaidou, D. Nagon A. Decarreau, and A. J. Melfi 22

 The Application of Drift Spectroscopy to the Multicomponent Analysis of Organic Chemicals Adsorbed on Montmorillonite

Robert W. Parker and Raymond L. Frost 32

 Influence of Citric Acid and Glycine on the Adsorption of Mercury (II) By Kaolinite Under Various pH Conditions

J. Singh, P. M. Huang, U. T. Hammer, and W. K. Liaw 41

 Alteration of silicic Vitric Tuffs Interbedded in Volcaniclastic Deposits of the Southern Basin and Range Province, Mexico: Evidences for Hydrothermal Reactions

Philippe Munch, Joelle Duplay, and Jean-Jacques Cocheme 49

 Evolution of Benzylammoniun-Vermiculite and Ornithine-Vermiculite Intercalates

C. de la Calle, M. I. Tejedor, and C. H. Pons 68

 Evaluation of Kinetic Models for the Smectite to Illite Transformation

W. Crawford Elliott and Gerald Matisoff 77

 FTIR Study of Competitive Water-Arene Sorption on Tetramethylammonium- and Trimethylphenylammonium-Montmorillonites

Jeffrey J. Stevens, Sharon J. Anderson, and Stephen A. Boyd 88

 Diagenesis and Metamorphism of Clay Minerals in the Helvetic Alps of Eastern Switzerland

Hejing Wang, Martin Frey, and Willem B. Stern 96

 Effect of Time and Temperature on the Chemical Composition and Crystallization of Mixed Iron and Aluminum Species

C. Colombo and A. Violante 113

 Effect of Salt on the Flocculation Behavior of Nano Particles in Oil Sands Fine Tailings

L. S. Kotylar, B. D. Sparks, and R. Schutte 121

 Orientation of Trimethylphenylammonium (TMPA) on Wyoming Montmorillonite: Implications for Sorption of Aromatic Compounds

Jeffrey J. Stevens and Sharon J. Anderson 132

 An FTIR Study of Water Sorption on TMA- and TMPA- Montmorillonites

Jeffrey J. Stevens and Sharon J. Anderson 142

 Notes

 Synthesis of Carbon-Hydrotalcite Complex and Its Thermal Degradation Behavior

Toshiyuki Hibino, Katsunori Kosuge, and Atsumu Tsunashima 151