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Potassium- and Ammonium-Treated Montmorillonites. I. Interstratified Structures with Ethylene Glycol and Water
Ethylene glycol complex Interstratification Layer charge Mixed layer Montmorillonite
2011/11/22
Abstract: Monoionic K- and NH4-smectites saturated with ethylene glycol form mixed-layer structures which usually consist of three kinds of layers: a 10-Å, non-expanded layer; a 14-Å, part...
Lithium and Potassium Saturation of Illite/Smectite Clays from Interlaminated Shales and Sandstones
Diagenesis Expandability Illite Interstratification Smectite
2012/2/8
Mixed-layer illite/smectite (I/S) clays in lower Eocene sediments of the Texas Gulf Coast decrease in expandability with depth as found in previous studies of clay diagenesis, but at the same depth th...
The Hydrothermal Transformation of Sodium and Potassium Smectite into Mixed-Layer Clay
Hydrothermal Transformation Sodium Potassium Smectite Mixed-Layer Clay
2012/2/13
The transformation of sodium and potassium smectite into mixed-layer clay was followed in hydrothermal kinetic experiments. Glasses of beidellite composition and the Wyoming bentonite were used as sta...
Potassium Selectivity of Clays as Affected by the State of Oxidation of Their Crystal Structure Iron
Potassium Selectivity of Clays Crystal Structure Iron Oxidation
2011/11/18
Abstract: The Ca-K exchange isotherms were determined at two temperatures for two highly montmorillonitic iron-rich soil clays in their oxidized and reduced states. The thermodynamic parameters K, ΔG0...
Effect of Oxidation and Reduction on Potassium Exchange of Biotite
Oxidation Reduction Potassium Exchange Biotite
2012/2/15
The selectivity of K over Ca of Amelia biotite increased sharply upon oxidation by H2O2 at pH 6·0. This increase in K selectivity was only partially reversible upon reduction by Na2S2O4. Oxidation by ...
Exchangeability of Potassium in Heated Fine-Grained Micaceous Minerals
Exchangeability Potassium Heated Fine-Grained Micaceous Minerals
2012/2/15
Samples of several naturally fine-grained micaceous minerals were heated at 450癈 for 24 hr (after the effects of other temperatures and heating periods were evaluated with the < 2 祄 fraction of Grundi...
The Alteration Products of Potassium Depleted Oxybiotite
Alteration Products Potassium Oxybiotite
2012/2/15
Artificial weathering of biotites, which contain various levels of structural ferric iron, by NaCl and NaBPh4 solutions produces minerals and structures similar to those described for naturally weathe...
Effect of Particle Size on Potassium Sorption by Potassium-Depleted Phlogopite
Particle Size Potassium Sorption Potassium-Depleted Phlogopite
2012/2/15
Sorption of K from mixed KCl and CaCl2 solutions by K-depleted, Ca-saturated phlogopite was studied to determine the effect of particle size. The experiments were done at room temperature with 25 mg o...
Effect of Particle Thickness on Potassium Exchange from Phlogopite
Particle Thickness Potassium Exchange Phlogopite
2012/2/15
Rates of exchange of K with Ca for fine (0·2–2μm) and coarse (54–75μm) and for thin and thick (37–45μm) phlogopite particles were determined using a repeated batch technique, which gave a measure of K...
Morphological Effects on Illite as a Result of Potassium Depletion
Morphological Effects Illite Potassium Depletion
2012/2/17
Several illites and a mixed-layer illite-montmorillonite developed fractures in some particles during progressive removal of interlayer potassium by solutions containing sodium tetraphenylboron. The a...
Formation of an Interstratified Mineral by Extraction of Potassium from Mica with Sodium Tetraphenylboron
Interstratified Mineral Potassium Mica Sodium Tetraphenylboron Extraction
2012/2/17
Interlayer K was extracted with sodium tetraphenylboron solution from a powdered sericite heated to the temperature of dehydroxylation and quenched to room temperature. By this procedure, sericite of ...
Relation of Potassium Exchange and Fixation to Degree of Weathering and Organic Matter Content in Micaceous Clays of Podzol Soils
Potassium Exchange Degree Weathering Organic Matter Content Micaceous Clays
2012/2/20
The rates of K exchange of untreated and peroxide-treated micaceous clays from five Podzol soils of increasing degrees of weathering were determined using sodium tetraphenyl boron. In addition, the am...
Potassium and Cesium Ion Selectivity in Relation to Clay Mineral Structure
Potassium Cesium Ion Selectivity Clay Mineral Structure
2011/11/17
Abstract: Selectivity of a number of vermiculites, montmorillonites and micas for K and Cs ions was determined by sorption of these ions from equilibrium solutions of diverse concentrations. The selec...
Effects of Potassium Removal on the b-Dimension of Phlogopite
Potassium Removal b-Dimension Phlogopite
2012/2/20
Potassium was removed from 5 to 20-?size fractions of two phlogopites by treatment with sodium tetraphenylboron and replaced with various exchange ions. The b-dimension of the mica increased with K+ r...
Differential Release of Potassium from Interstratified Mica Clay Minerals as Related to Probable Differences in Their Mica Layer Components
Differential Release Potassium Interstratified Mica Clay Minerals Mica Layer Components
2012/2/20
Release of potassium by extraction with solutions containing sodium tetraphenyl boron or by leaching with 0·1 N barium chloride seemed to be related to the nature of the mica layers in the interstrati...