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Compaction and Swelling of Ca-Smectite in Water and in CaCl2 Solutions: Water Activity Measurements and Matrix Resistance to Compaction
Calcium chloride Compaction Matrix resistance Rheology Smectite Swelling Water activity
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2011/11/30
Abstract: Direct water-activity measurements were made for calcium-smectite-CaCl2 mixtures. The samples used were prepared by high-pressure filtration and had water contents <0.60% by weight of clay. ...
Hydrophobicity of Siloxane Surfaces in Smectites as Revealed by Aromatic Hydrocarbon Adsorption from Water
Adsorption isotherm Alkylbenzene Benzene Langmuir equation Naphthalene Organo-clay Surface area
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2012/1/4
The nature of the siloxane surface in smectites was investigated by measuring the adsorption of aromatic hydrocarbons from water by organo-clays. The organo-clays were prepared by replacing the hydrop...
Bond Energy of Adsorbed and Interlayer Water: Kerolite Dehydration at Elevated Pressures
Bond energy Dehydration High-pressure differential thermal analysis Kerolite Water
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2011/12/31
The dehydration reaction of kerolite was investigated using high-pressure differential thermal analysis at pressures as high as 600 bars. The peak associated with the dehydration is broad, suggesting ...
Swelling of n-Butylammonium Vermiculite in Water
DLVO theory n-Butylammonium chloride Neutron diffraction Swelling Vermiculite
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2011/11/30
Abstract: The swelling of an n-butylammonium vermiculite in solutions of n-butylammonium chloride has been studied by neutron diffraction as a function of temperature and the concentration of the soak...
Changes in the Properties of a Montmorillonite-Water System during the Adsorption and Desorption of Water: Hysteresis
Adsorption Desorption Hysteresis Infrared spectroscopy Montmorillonite Vapor pressure Water
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2012/1/4
Samples of Na-saturated, Upton montmorillonite were prepared with different contents of water (H2O or D2O) by: (1) adsorption of water from the vapor phase at a specific value of p/p°, the relative hu...
Synthesis of Highly Microporous and Hydrophilic Alumina-Pillared Montmorillonite: Water-Sorption Properties
Hydrophobicity Montmorillonite Pillared interlayer complex Porosity Surface condensation Thermal treatment X-ray powder diffraction
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2012/1/4
A montmorillonite exchanged with large hydroxy-Al cations was thermally treated to convert the hydroxy cations to oxide pillars and to generate permanent microporosity in the interlayers. The pillared...
Role of Water in the Smectite-to-Illite Reaction
Hydrothermal Illite Interstratification Smectite Water
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2012/1/4
A series of hydrothermal experiments was performed to determine the effect of fluid abundance on the reaction of smectite to illite. Experiments were conducted on K-saturated montmorillonite (<0.1-祄 f...
Influence of Clay on Water Movement in Coarse-Textured Soils
Clay fraction Hydraulic conductivity Particle size Soil Water movement
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2012/1/4
Effects of clay content on saturated hydraulic conductivities (k) of two coarse textured soils, Vista (mixed thermic Typic Xerochrepts) and Hanford (mixed nonacid Typic Xerorthents), and a medium text...
Deuterium Nuclear Magnetic Resonance Studies of Water Molecules Restrained by their Proximity to a Clay Surface
Nuclear magnetic resonance Orientation Quadrupolar splitting Smectite Surface acidity Water
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2012/1/6
Observation of quadrupolar splittings for 2H and 17O nuclei from D2O solvent molecules in suspensions of the Ecca Gum BP bentonite points unambiguously to the ordering of water molecules with respect ...
Adsorption of Water by Homoionic Exchange Forms of Wyoming Montmorillonite (SWy-1)
Adsorption Enthalpy Entropy Montmorillonite Relative humidity Water
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2012/1/5
Adsorption isotherms for water on homoionic (Ca2+, Li+, Na+, and K+) exchanged forms of Crook County, Wyoming, montmorillonite (CMS Source Clay SWy-1) were measured between 25° and 70°C using a vacuum...
Effect of Compaction Pressure and Water Content on the Thermal Conductivity of Some Natural Clays
Compaction pressure Illite Palygorskite Smectite Thermal conductivity Water content
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2012/1/10
This paper presents thermal conductivity data for highly compacted Ca-smectite, Na-smectite, illite, and palygorskite as a function of density (i.e., compaction pressure), water content, and temperatu...
Review of the Diffusion of Water and Pyridine in the Interlayer Space of Montmorillonite: Relevance to Kinetics of Catalytic Reactions in Clays
Catalysis Diffusion Interlayer space Kinetics Montmorillonite Pyridine Water
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2012/2/1
With the current interest in the use of transition metal-exchanged phyllosilicates as catalysts for novel organic syntheses, investigations into the factors which affect the movement of reactant, prod...
Interlayer Water and Swelling Properties of Natural and Homoionic Corrensite
Chlorite Corrensite Dehydration Exchange cations Smectite Water X-ray powder diffraction
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2012/1/13
A corrensite-like mineral, from near Borgotaro, Parma (Taro Valley, Italy), was studied by X-ray powder diffraction (XRD) and thermal analysis at different temperatures and water vapor pressures in th...
Static and Dynamic Structure of Water in Hydrated Kaolinites. I. The Static Structure
Dimethylsulfoxide Halloysite Hydroxyl Infrared spectroscopy Kaolinite Water
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2012/2/6
Four hydrates with d(001) = 8.4, 8.6, and 10 侌 (two types) were synthesized by intercalating kaolinite with dimethylsulfoxide and treating the intercalated clay with fluoride ions. X-ray powder diffra...
Infrared Spectroscopic Study of Adsorbed Water on Reduced-Charge Na/Li-Montmorillonites
Cation-exchange capacity Infrared spectroscopy Montmorillonite Reduced charge Water adsorption
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2011/11/23
Abstract: Infrared (IR) spectra in the fundamental and near-IR regions were obtained for Na-saturated Wyoming montmorillonite and reduced-charge Na/Li-saturated. Wyoming montmorillonites hydrated unde...