Clays and Clay Minerals¨

Volume 44 Number 1 February 1996

Contents

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

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