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The Effect of Surface Modification by an Organosilane on the Electrochemical Properties of Kaolinite
Acidity constants Electrophoresis Kaolinite Modeling Silane Surface charge Surface modification
2011/12/28
The electrochemical properties of kaolinite before and after modification with chlorodimethyl-octadecylsilane have been studied by electrophoretic mobility, surface charge titration, and extrapolated ...
Composition and Properties of Synthetic Hydrotalcites
Aluminate liquor Aluminum substitution Anion replacement Hydrotalcite Magnesium oxide Pillaring
2011/12/30
Hydrotalcites of high aluminum content have been synthesized from aluminate liquors of varying composition and activated magnesia obtained by calcination of hydroxide or hydroxycarbonate precursors. L...
Properties and Characterization of Al2O3 and SiO2-TiO2 Pillared Saponite
Adsorption Clays Cross-linking MASNMR Montmorillonite Pillared clay Saponite Smectite
2011/12/30
A saponite pillared with a single (Al2O3) or a mixed (SiO2-TiO2) oxide exhibited basal spacings of 16–19 and 30–40Å, respectively. The pillared structures were found to be stable up to 700°C. Wa...
Some Colloidal Properties of Beidellite: Comparison with Low and High Charge Montmorillonites
Beidellite Charge location Coagulation Poly(vinyl) alcohol Surface charge density
2011/12/30
Recent evidence of the occurrence of beidellite in many soils around the world necessitates a better understanding of the role of charge location on the colloidal behavior of this smectite as compared...
Swelling Properties of Microbially Reduced Ferruginous Smectite
Dithionite Microorganism Pseudomonas
2011/12/29
Structural Fe in ferruginous smectite (sample SWa-1, Source Clays Repository of the Clay Minerals Society) was reduced by a mixture of five Pseudomonas species of bacteria in a defined Fe-free medium ...
Effects of Layer Charge, Charge Location, and Energy Change on Expansion Properties of Dioctahedral Smectites
Charge location Ethylene glycol Expanded phase Expansion energy Glycerol Layer charge Relative humidity Smectite
2011/12/1
Abstract: Expansion properties of ten homoionic smectites that differed in amount and location of layer charge were examined by X-ray powder diffraction analysis at various relative humidities, or aft...
Effect of Tartaric Acid and pH on the Nature and Physicochemical Properties of Short-range Ordered Aluminum Precipitation Products
Aggregation Aluminum hydroxides Crystallization Porosity Precipitation Surface area Tartaric acid
2011/12/31
The influence of tartaric acid and pH on chemical composition, morphology, surface area, and porosity of short-range ordered Al precipitation products was studied. Samples were prepared (1) at pH 8.0 ...
Structural and Magnetic Properties of Ferrihydrite
Ferrihydrite Ferrimagnetism Antiferromagnetism
2011/12/30
57Fe M鰏sbauer spectra of two synthetic samples of ferrihydrite, recorded at 4.2 K in applied fields of up to 9 T, have been analysed by a mean-field model. The samples exhibit two and six X-ray diffra...
X-ray Powder Diffraction Studies on the Rehydration Properties of Beidellite
Beidellite Cation migration Dehydration Fourier analysis Interlayer ration Rehydration X-ray powder diffraction
2011/11/30
Abstract: The rehydration properties of Ca-, Mg-, Na-, and K-saturated homoionic beidellites after heating at various temperatures were compared with those of montmorillonites. The behavior of interla...
Preparation and Properties of Large-Pore La-Al-Pillared Montmorillonite
Aluminum Cross-linked smectite Lanthanum Montmorillonite Pillared interlayer complexes X-ray powder diffraction
2011/12/31
Large-pore La-Al-pillared montmorillonite was prepared by reacting montmorillonite with hydrothermally treated mixtures of aluminum chlorohydrate and lanthanum chloride. The large-pore La-Al-pillared ...
Preparation and Properties of Pillared Interstratified Illite/Smectite
Cross-linking Illite/smectite Pillaring Smectite Thermal stability X-ray powder diffraction
2012/1/5
Pillared, regularly and randomly interstratified illite/smectite (I/S) was prepared by interacting aluminum chlorohydrate with I/S in aqueous dispersion. I/S samples from Kinnekulle, Sweden, ranging i...
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
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
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...
Study of Some Physicochemical Properties of Pillared Montmorillonites: Acid-Base Potentiometric Titrations and Electrophoretic Measurements
Electrophoretic mobility Montmorillonite Pillared clays Potentiometric titration Surface charge
2012/1/4
The surface charges and the zeta potential of a Na-montmorillonite (Na-mont) and two pillared montmorillonite (MP1 and MP2) samples with different aluminum contents were determined by potentiometric t...
Rheological Properties of Organophilic Synthetic Hectorites and Saponites
Hectorite Organophilic Particle aggregation Rheology Saponite Smectite Viscosity X-ray powder diffraction
2012/1/5
To determine the dependency of theological properties on mineralogical characteristics, eleven organophilic hectorite and nine organophilic saponite samples were prepared from hydrothermally synthesiz...