Workshop LecturesThe Clay Minerals Society

Volume 6Table of Contents

Volume 6, 1994, Layer Charge Characteristics of 2:1 Silicate Clay MineralsA. R. Mermut, Editor

Layer Charge Determination by Alkylammonium Ions…………………G. Lagaly Introduction Materials and Methods Results

Interlamellar Arrangement of Alkylammonium IonsLayer Charge Determination

Smectites Corrections Vermiculites Micas Mixed-Layer Minerals

Applications Identification of Smectites and Vermiculites High Performance Characterization of Smectites and Vermiculites Montmorillonite Content of Bentonites Cations at the Edges HRTEM Techniques

Summary References Cited

Role of Layer Charge in Organic Contaminant Sorption by Organo-Clays………………………………………S.A. Boyd and W.F. Jaynes

Introduction Organophillic Clays Adsorptive Clays Role of Layer Charge

Organiphilic Clays Adsorptive Clays

Acknowledgements References Cited

Evaluation of Structural Formula and Alkylammonium Methods of Determining Layer Charge…………………………………D.A. Laird

Introduction The Structural Formula Method

Structural Formula Calculations Layer Charge Estimates From Structural Formulae Sample Contamination Effects

Alkylammonium Method Layer Charge Calculations Layer Charge Heterogeneity - Traditional Interpretation Layer Charge Heterogeneity - Alternative Interpretation The Particle Size Effect Identification of Vermiculite

Comparison Of Layer Charge Values Determined By The Structural Formula And Alkylammonium Methods Summary References Cited

Problems Associated with Layer Charge Characterizationof 2:1 Phyllosilicates…………………………………………………A.R. Mermut

Introduction Determination of Layer Charge in High Charge Phyllosilicates Charge Distribution Between Tetrahedral and Octahedral Sheet by Li-Saturation Calculation of the Average Charge by Nitrogen Determination Correction of the Peak Positions of Alkylammonium Saturated Clays References Cited

The Movement of Neutral Particles in Charged Media ............................J. Farmer Introduction Particulate Generation and Removal Processes

Particle Generation Particle Removal

Multicomponent Aqueous Phase Chemistry of Carrier Mechanism

Competitive Interactions of Solutes and Montmorillonite Retention of Ethylene Dibromide by Clay Minerals

References Cited