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Phase Analysis of Clays Using an Expert System and Calculation Programs for X-Ray Diffraction by Two- and Three-Component Mixed-Layer Minerals
Clay Analysis Expert System Mixed-Layer Minerals Phase Analysis XRD
2011/12/2
Abstract: X-ray phase analysis of clays is difficult because these materials generally consist of a mixture of different phases, i.e., mixed-layer minerals, individual clay minerals (non mixed-layer),...
Oxygen Isotope Compositions of Mixed-Layer Serpentine-Chlorite and Illite-Smectite in the Tuscaloosa Formation (U.S. Gulf Coast): Implications for Pore Fluids and Mineralogic Reactions
Diagenesis Illite-Smectite Oxygen Isotopes Sandstone Serpentine-Chlorite Tuscaloosa Formation
2011/12/8
Abstract: Oxygen isotopic compositions were determined for coexisting mixed-layer serpentine-chlorite (Sp-Ch) and illite-smectite (I-S) from 5 Tuscaloosa Formation sandstone cores sampled between 1937...
Characterization of mixed-layer illite-smectite from bentonites using microscopic, chemical and X-ray methods: Constraints on the smectite-to-illite transformation mechanism
Characterization mixed-layer illite-smectite microscopic X-ray methods smectite-to-illite transformation mechanism
2012/3/31
We studied mixed-layer illite-smectite (I/S) (,1 or 0.5 mm size fractions) in 28 diage-netic bentonite samples, Pliocene to Ordovician in age, from different locations in North America and Europe to i...
Comparison of Structural Models of Mixed-Layer Illite/Smectite and Reaction Mechanisms of Smectite Illitization
Illite Illite/Smectite Mixed-Layer Reaction Mechanism Smectite
2011/12/22
Abstract: This paper compares mechanisms of the reaction of smectite to illite, in light of structural models for interstratified illite/smectite (I/S). The crystal structure of I/S has been described...
Corrensite: A single phase or a mixed-layer phyllosilicate in the saponite-to-chlorite conversion series? A case study of Sancerre-Couy deep drill hole
Corrensite single phase mixed-layer phyllosilicate saponite-to-chlorite conversion series case study Sancerre-Couy hole
2012/4/1
Transmission electron microscopy (TEM) , analytical electron microscopy (AEM), and
decomposition-simulation of X-ray diffraction (XRD) patterns were used to characterize
trioctahedral clay from Sanc...
Some Evidence Supporting the Existence of Polar Layers in Mixed-Layer Illite/Smectite
Differential Thermal Analysis Mixed-layer illite/smectite Polar layer
2011/12/28
The fraction <20 祄 of a bentonitic material was selected to study the transformation of smectite into illite under hydrothermal conditions. Powder XRD showed that the studied material was composed of ...
Quantification Curves for XRD Analysis of Mixed-Layer 14A/10A Clay Minerals
Biotite Chlorite Interstratification Mixed-layer quantification Vermiculite
2011/12/28
Using theoretical profiles of diffracted X-ray intensity for interstratification between layers having d-spacings around 14.3 侌 and 10.1 侌, a series of diagrams was derived from which the proportion o...
A Simple Technique for Identification of One-Dimensional Powder X-Ray Diffraction Patterns for Mixed-Layer Illite-Smectites and Other Interstratified Minerals
Identification Illite-smectite Interstratification X-ray diffraction
2011/12/29
A very simple technique is proposed for a quantitative or semiquantitative interpretation of X-ray diffraction (XRD) patterns for two-component mixed-layer structures. It is suitable for a determinati...
Far-Infrared Study of the Interlayer Torsional-Vibrational Mode of Mixed-Layer Illite/Smectites
Burial diagenesis Far-infrared Illite/smectite Miocene shale Terrebonne Parish Louisiana X-ray diffraction
2011/12/1
Abstract: Investigation of mixed-layer illite/smectites with far-infrared (FIR) spectroscopy indicates the presence of torsional mode absorption bands associated with interlayer fixed-K sites. By cont...
Mixed-Layer Clay Geothermometry in the Wairakei Geothermal Field, New Zealand
Geothermal system Hydrothermal alteration Mixed-layer clays Reservoir permeability
2012/1/4
Mixed-layer clays of variable composition and structure occur in core samples from two drillholes (WK207 and WK210) drilled into the Te Mihi sector of the Wairakei geothermal field. These were identif...
High-Resolution Transmission Electron Microscopy and Electron Diffraction of Mixed-Layer Illite/Smectite: Experimental Results
Electron diffraction Fundamental particle High-resolution transmission electron microscopy Illite/smectite Interstratification Smectite
2011/11/30
Abstract: High-resolution transmission electron microscopy (HRTEM) and electron diffraction experiments have been performed on R1 and R> 1 illite/smectite (I/S) samples that from X-ray powder diffract...
Hydrothermal Reactivity of Mixed-Layer Kaolinite/Smectite: Experimental Transformation of High-Charge to Low-Charge Smectite
Cation-exchange capacity Hydrothermal transformation Kaolinite/smectite Layer charge Smectite X-ray powder diffraction
2012/1/4
A mixed-layer kaolinite/smectite (K/S) containing trace amounts of quartz, discrete kaolinite, goethite-hematite, and calcite was hydrothermally reacted with deionized water at 150°, 200°, and 250°C f...
Direct High-Resolution Transmission Electron Microscopic Measurement of Expandability of Mixed-Layer Illite/Smectite in Bentonite Rock
Expandability Fundamental particle High-resolution transmission electron microscopy Illite/smectite Interstratification
2012/1/4
Samples of mixed-layer illite/smectite were investigated from a single bentonite bed zoned with respect to expandability from 90 to 30%. Chips of natural rocks were embedded in a resin, using procedur...
High-Resolution Transmission Electron Microscopy of Mixed-Layer Illite/Smectite: Computer Simulations
High-resolution transmission electron microscopy Illite Image simulation Mixed layer Smectite
2011/11/30
Abstract: High-resolution transmission electron microscope images of dioctahedral mixed-layer clay structures (illite/smectite) having various substitutional and polytypic schemes were modeled using c...
Pressure-Temperature-Composition of Illite/Smectite Mixed-Layer Minerals: Niger Delta Mudstones and other Examples
Diagenesis Geothermal gradient Illite/smectite Ordering Smectite
2012/1/12
X-ray powder diffraction (XRD) studies of the clay fraction of Upper Cretaceous mudstones from a shallow (2.5 km) drill hole in the Niger delta indicate a high geothermal gradient (about 100亱C/km) dur...