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Chemistry of Illite/Smectite and End-Member Illite
Bentonite Chemical composition Diagenesis Illite Illite/smectite Smectite
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2012/1/12
Chemical data from three different series of diagenetic illite/smectites (I/S), analyzed statistically by two regresion techniques, indicate that the content of fixed-K per illite layer is not constan...
Morphology of Clay Minerals in the Smectite-to-Illite Conversion Series by Scanning Electron Microscopy
Burial diagenesis Hydrothermal alteration Illite/smectite Morphology Scanning electron microscopy Smectite-to-illite conversion
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2012/1/11
The morphology of illite/smectite (I/S) from deeply buried bentonites and hydrothermally altered Tertiary volcanic rocks from Japan changes in parallel with the proportion of expandable layers in the ...
Transmission and Analytical Electron Microscopy of the Smectite-to-Illite Transition
Analytical electron microscopy Burial diagenesis Illite Interstratification Smectite Transmission electron microscopy
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2012/1/11
The smectite to illite reaction was studied by transmission and analytical electron microscopy (TEM/AEM) in argillaceous sediments from depths of 1750, 2450, and 5500 m in a Gulf Coast well. Smectite ...
Microstructure in Mixed-Layer Illite/Smectite and its Relationship to the Reaction of Smectite to Illite
Edge dislocation Illite Lattice image Mixed layer Smectite Transmission electron microscopy X-ray powder diffraction
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2012/1/11
The reaction of smectite to illite in shale from the COST 1 well in the south Texas Gulf Coast and from altered ash-fall tufts from the Morrison Formation in New Mexico was investigated using X-ray po...
Mixed-Layer Illite/Smectite Minerals in Tertiary Sandstones and Shales, San Joaquin Basin, California
Carbonate cementation Illite/smectite Microprobe analysis Mixed layer Smectite Time-temperature index
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2012/1/11
The southern San Joaquin Valley contains more than 7 km of sedimentary fill, largely Miocene and younger in age. Ancient depositional environments ranged from alluvial fans at the basin margins to tur...
Mineralogical and Morphological Evidence for the Formation of Illite at the Expense of Illite/Smectite
Diagenesis Illite Illite/smectite Morphology Scanning electron microscopy X-ray powder diffraction
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2012/2/1
The conversion of smectite to illite by way of a mixed-layer illite/smectite (I/S) series was found to be the major depth-related reaction in clay-mineral assemblages from two cored sedimentary sequen...
Surface Potentials Derived from Co-Ion Exclusion Measurements on Homoionic Montmorillonite and Illite
Co-ion exclusion Double-layer potential Illite Montmorillonite Surface charge
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2012/2/3
Simple equations are presented which allow double-layer potentials of clays to be derived from co-ion exclusion measurements in monovalent and divalent electrolyte solutions. These equations have been...
Free Energies of Formation of Illite Solid Solutions and their Compositional Dependence
Formation Free energy of formation Illite Interstitial water Solid solution Thermodynamics
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2011/11/23
Abstract: Electron probe analyses of diagenetic illites in Eocene sandstones from Kettleman North Dome, California, along with analyses of coexisting interstitial waters were used to calculate apparen...
Effect of Exchangeable Ions and Ionic Strength on Boron Adsorption by Montmorillonite and Illite
Adsorption Boron Cation exchange Illite Ionic strength Montmorillonite
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2012/2/7
The effects of exchangeable Na and Ca and the ionic strength of NaCl and CaCl2 solutions on the boron adsorption by the Na and Ca forms of montmorillonite and illite at pH 9 were studied. The boron ad...
Lithium and Potassium Saturation of Illite/Smectite Clays from Interlaminated Shales and Sandstones
Diagenesis Expandability Illite Interstratification Smectite
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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...
Smectite to Illite Conversion Rates: Effects of Solution Chemistry
Hydrothermal Illite Mixed layer Reaction rate Silica dissolution Smectite
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2012/2/8
Mixed-layer illite/smectite (I/S) was formed by reacting the Chambers or Polkville montmorillonite hydrothermally at 270° and 350°C from several hours to more than 15 weeks. Reactions were conducted i...
Precise Identification of Illite/Smectite Interstratifications by X-ray Powder Diffraction
Ethylene glycol Illite Illite/smectite mixed layer Interstratification Smectite X-ray powder diffraction
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2012/2/9
The thickness of the two-layer ethylene glycol complex of dioctahedral smectites varies under room conditions between 17.3 and 16.5 侌 because of such factors as layer charge density, type of interlaye...
Hydrothermal Alteration of a Serpentinite Near Takovo, Yugoslavia, to Chromium-Bearing Illite/Smectite, Kaolinite, Tosudite, and Halloysite
Cr-halloysite Cr-illite/smectite Cr-kaolinite Cr-tosudite Hydrothermal Serpentinite
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2012/2/9
Hydrothermal alteration products of serpentinite near Takovo, Yugoslavia, were studied by X-ray powder diffraction and chemical analysis. A zone of mainly blue clays adjacent to the hydrothermal vein ...
Adsorbed Cr(III) on Chlorite, Illite, and Kaolinite: An X-ray Photoelectron Spectroscopic Study
Adsorption Binding energy Chlorite Chromium Illite Kaolinite XPS
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2012/2/8
The adsorption of Cr(III) was studied at pH 1, 2, 3, 4, 6, 8, and 10 on chlorite and kaolinite and at pH 1, 2, 3, and 6 on illite. The amount of chromium adsorbed on chlorite varied from 3.1 × 10ͨ...
Role of Iron Reduction in the Conversion of Smectite to Illite in Bentonites in the Disturbed Belt, Montana
Bentonite Illite Iron reduction Mixed layer Montana Smectite
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2012/2/10
Cretaceous bentonites were collected in outcrop from the Sweetgrass Arch and the Disturbed Belt in Montana. The mixed-layer illite-smectite (I/S) components of the bentonites from the Sweetgrass Arch ...