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Particle Shape versus Coherent Scattering Domain of Illite/Smectite: Evidence from HRTEM of Dolna Ves Clays
Coherent scattering domain Fundamental particle HRTEM Illite/Smectite Mixed-layer crystal
2011/12/27
Fundamental particle thickness measurements of Dolná Ves hydrothermal illite/smectite (I/S) samples confirmed earlier findings regarding the content of fixed cations in illite interlayers (ca. 0.9/O10...
The nature of diffraction effects from illite and illite-smectite consisting of interstratified trans-vacant and cis-vacant 2:1 layers: A semiquantitative technique for determination of layer-type content
illite illite-smectite interstratified trans-vacant cis-vacant 2:1 layers semiquantitative technique layer-type content
2012/4/6
Previous workhas described the structural and diffraction criteria for distinguishing between tv-1M, cv-lM, and m-lM illite varieties, wheretv-1M illite corresponds to a structure withtrans vacant(tv)...
Evolution of Illite/Smectite from Early Diagenesis through Incipient Metamorphism in Sediments of the Basque-Cantabrian Basin
Basque Cantabrian Basin Diagenesis Illite Smectite
2011/12/23
Abstract: Prograde evolution of illite/smectite occurring in an unusually-thick (8000 m) sequence of Mesozoic-Cenozoic sediments in the Basque-Cantabrian Basin, Spain, has been studied using XRD and T...
Change in Layer Charge of Smectites and Smectite Layers in Illite/Smectite during Diagenetic Alteration
Beidellitization Charge Location Diagenesis Greene-Kelly Test Illite/Smectite Layer Charge Smectite
2011/12/27
Abstract: The changes in amount and location of layer charge during diagenetic alteration have been investigated for smectites and smectite layers of illite/smectite interstratified minerals (I/S) by ...
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 ...
Characterization of Untreated and Alkylammonium Ion Exchanged Illite/Smectite by High Resolution Transmission Electron Microscopy
Alkylammonium Clays Diagenesis Illite Interstratification Smectite Transmission Electron Microscopy
2011/12/28
High resolution transmission electron microscopy (HRTEM) have been performed on dispersed portions of one R > 1 and two R3 illite/smectite (I/S) samples from Silurian K-bentonites. R > 1 sample was st...
Rotationally Disordered Illite/Smectite in Paleozoic K-Bentonites
Bentonite Cis-vacant octahedra Crystal structure Illite/Smectite Polytype Rotational disorder X-ray diffraction
2011/12/28
The three-dimensional crystal structure of rotationally disordered illite/smectite (I/S) in K-bentonite samples from the Appalachian basin and neighboring areas is described using the parameters of 1)...
Illite/Smectite Diagenesis and Its Variable Correlation with Vitrinite Reflectance in the Pannonian Basin
Illite/smectite Kinetics Pannonian Basin Thermal history Vitrinite reflectance
2011/12/27
The correlation between illite/smectite (I/S) diagenesis and mean vitrinite reflectance (Ro) data is examined in mudrocks from a hydrocarbon exploration well (geothermal gradient 35°C km−1) from...
Layer Charge of the Expandable Component of Illite/Smectite in K-Bentonite as Determined by Alkylammonium Ion Exchange
Alkylammonium Bentonite Clays Diagenesis Illite Illite/smectite Layer charge Smectite
2011/12/27
The charge of the expandable interlayers in a series of fourteen diagenetic illite/smectites (I/S) from lower Paleozoic K-bentonites was determined by the alkylammonium ion exchange method. The magnit...
Infrared Spectroscopy Study of Tetrahedral and Octahedral Substitutions in an Interstratified Illite-Smectite Clay
Chourabi-Fripiat test Hofmann-Klemen effect Illite Infrared spectroscopy Interstratified Smectite Tetrahedral substitution
2011/12/28
Infrared spectroscopy is used to distinguish between octahedral and tetrahedral substitutions in an interstratified illite-smectite clay. The Hofmann-Klemen (Li) test suggests that the AlMg□ and FeMg□...
A Chemical, XRD, and 27Al MAS NMR Investigation of Miocene Gulf Coast Shales with Application to Understanding Illite/Smectite Crystal-Chemistry
Burial diagenesis Gulf Coast Illite/smectite Miocene NMR
2011/12/30
This study assesses the distribution of Al and Fe in mixed-layer illite/smectites (I/S) in shales undergoing burial diagenetic changes, using evidence from 27Al NMR, XRD, and chemical analyses. Sample...
Characterization of Hydroxy-Interlayered Vermiculite and Illite/Smectite Interstratified Minerals from the Weathering of Chlorite in a Cryorthod
Chlorite Hydroxy-interlayered intergrades Illite/smectite mixed-layers Soil clays Spodosol
2011/12/30
X-ray diffraction, FTIR, and chemical analyses were performed on clay fractions (1? 祄, <0.1 祄), separated by means of size fractionations and high-gradient magnetic separation techniques, from a Cryor...
Illite/Smectite Geothermometry of the Proterozoic Oronto Group, Midcontinent Rift System
Diagenesis Illite/Smectite Mineralization Proterozoic Retrograde Thermal history
2011/12/29
Characterization of the Nonesuch Formation, middle unit of the Proterozoic Oronto Group, as a potential hydrocarbon source for the Lake Superior basin portion of the Midcontinent Rift system requires ...
Considerations and Applications of the Illite/Smectite Geothermometer in Hydrocarbon-Bearing Rocks of Miocene to Mississippian Age
Geothermometer Hydrocarbons Illite/smectite Illitization Smectite diagenesis Thermal maturity
2011/12/29
Empirical relationships between clay mineral transformations and temperature provide a basis for the use of clay minerals as geothermometers. Clay-mineral geothermometry has been applied mainly to dia...
X-ray Diffraction Studies of Illite/Smectite from Rocks, < 1 祄 Randomly Oriented Powders, and < 1 祄 Oriented Powder Aggregates: The Absence of Laboratory-Induced Artifacts
Artifacts Illite/smectite Powder X-ray diffraction Sample preparation Turbostratic X-ray coherence
2011/12/31
X-ray diffraction patterns were obtained from rock fragments, < 1 祄 randomly oriented freeze-dried powders, and < 1 祄 oriented aggregates for 11 mixed-layered illite/smectite samples (K-bentonites) th...