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Structural Transformation of 2:1 Dioctahedral Layer Silicates during Dehydroxylation-Rehydroxylation Reactions
Cation Migration Celadonite Cis-Vacant Octahedra Dehydroxylation Glauconite Illite Rehydroxylation Smectites Structure Trans-Vacant Octahedra
2011/12/6
Abstract: The structural transformation of dioctahedral 2:1 layer silicates (illite, montmorillonite, glauconite, and celadonite) during a dehydoxylation-rehydroxylation process has been studied by X-...
Hydroxy-Interlayers in Expansible Layer Silicates and Their Relation to Potassium Fixation
Hydroxyaluminum Hydroxyaluminosilicate Montmorillonite Potassium Fixation Vermiculite
2011/12/8
Abstract: Hydroxyaluminosilicate (HAS) and hydroxyaluminum (HyA) ionic solutions having final Al concentrations ranging from 3.74 to 4.00 mM; NaOH/Al molar ratios of 1.0, 2.0 and 2.5; and Si/Al molar ...
Biomineralization of Layer Silicates and Hydrated Fe/Mn Oxides in Microbial Mats: An Electron Microscopical Study
Bacterial Cell Electron Microscopy Freshwater Hydrated Fe-Mn Oxides Layer Silicates Microbial Mats
2011/12/9
Abstract: The formation of layer silicates on capsuled bacterial cell walls was studied in freshwater microbial mats. The trends associated with Al, Si, Mn and Fe deposits with capsules are consistent...
Cation Exchange Capacity of Layer Silicates and Palagonitized Glass in Mafic Volcanic Rocks: A Comparative Study of Bulk Extraction and In Situ Techniques
Cation Exchange Capacity Corrensite Electron microprobe analysis Extractable cations Palagonite Smectite
2011/12/27
The cation exchange capacities (CEC) and extractable cations in smectite, corrensite and palagonitized glass from hydrothermally-altered pillow lavas and hyaloclastite breccias were measured by both b...
An Improved Model for Structural Transformations of Heat-Treated Aluminous Dioctahedral 2:1 Layer Silicates
Beidelites Cis-vacant octahedra Dehydroxylation Illites Montmorillonites Trans-vacant octahedra
2011/12/28
An improved model for the interpretation of thermal effects during dehydroxylation in aluminous dioctahedral 2:1 layer phyllosilicates considers trans-vacant (tv) and cis-vacant (cv) 2:1 layers and le...
Layer Silicates from Serpentinite-Pegmatite Contact (Wiry, Lower Silesia, Poland)
Chlorite Intergrade Mica SEM Serpentinite/pegmatite contact Three component interstratified minerals Vermiculite Weathering X-ray powder
2011/12/30
Highly tectonized contact between serpentinite and younger pegmatite in the magnesite mine of Wiry contains various layer silicates. Vermiculite, chlorite, smectite, and interstratified mica-vermiculi...
Charge Heterogeneity and Nanostructure of 2:1 Layer Silicates by High-Resolution Transmission Electron Microscopy
Charge heterogeneity Clays High-resolution transmission electron microscopy Illite Montmorillonite Nanostructure Smectite Vermiculite
2011/12/30
Several soil and reference smectites and vermiculites and one reference illite were examined by high-resolution transmission electron microscopy (HRTEM) to decipher the nanostructure and layer charge ...
Computer Simulation of Cation Distribution in Dioctahedral 2:1 Layer Silicates Using IR-Data: Application to Mossbauer Spectroscopy of a Glauconite Sample
Cation distribution Computer simulation Glauconite Mossbauer spectra
2011/12/31
A new approach is described to computer simulate cation distribution in octahedral sheets of dioctahedral 2:1 layer silicates with vacant trans-octahedra. This approach makes use of the information on...
19F MAS-NMR Study of Structural Fluorine in Some Natural and Synthetic 2:1 Layer Silicates
Clay minerals 19F MAS-NMR Fluorine Layer silicates Silicates Smectites
2011/12/30
High-resolution solid-state, fluorine-19, magic-angle spinning-nuclear magnetic resonance spectroscopy (MAS-NMR) was used to study natural and synthetic fluorinated 2:1 layer silicates of known compos...
Noncentric Layer Silicates: An Optical Second Harmonic Generation, Chemical, and X-ray Study
Acentricity Chlorite Electron microprobe Lithium Mica Second harmonic generation X-ray diffraction
2012/2/7
Twenty-nine chlorites, seventeen lithium-free micas, and twenty-two lithium-bearing micas from diverse localities have been studied by X-ray diffraction, microprobe, and optical second harmonic genera...
Comparison of Orientations of OH-Bonds in Layer Silicates by Diffraction Methods and Electrostatic Calculations
Chlorite Dickite Electrostatic calculations Hydroxyl vectors Mica X-ray diffraction
2012/2/8
Orientations of OH-vectors in structural hydroxyl groups of layer silicates were defined both from diffraction data and calculations of electrostatic energy. The comparison of the results showed that ...
Adsorbed Molecules on Solvated Layer Silicates: Surface Mobility and Orientation from ESR Studies
Adsorbed Molecules Solvated Layer Silicates Surface Mobility Orientation
2011/11/18
Abstract: The adsorption of nitroxide spin probes on smectites solvated in liquids of greatly different polarity was studied using electron spin resonance (ESR) spectroscopy. Adsorbed probes demonstra...
Use of Long-Spacing Alcohols and Alkanes for Calibration of Long Spacings from Layer Silicates, Particularly Clay Minerals
Long-Spacing Alcohols Alkanes Calibration Long Spacings Layer Silicates Particularly Clay Minerals
2012/2/15
Lattice spacings of layer silicates, particularly clay minerals, may exceed 20 Å. The errors in measuring lattice spacings increase rapidly for spacings greater than about 10 Å and diffrac...
Interlamellar Metal Complexes in Layer Silicates III Silver(I)—Arene Complexes in Smectites
Interlamellar Metal Complexes Layer Silicates Smectites Arene
2012/2/17
The complexation of benzene and several methyl substituted benzenes with exchangeable silver(I) on the interlamellar surfaces of Ag(I)-montmorillonite has been studied using spectroscopic methods. The...
Surface Charge Characterization of Layer Silicates by Competitive Adsorption of Two Organic Divalent Cations
Surface Charge Characterization Layer Silicates Competitive Adsorption Two Organic Divalent Cations
2012/2/20
Diquat2+ (1,1′-ethylene-2,2′-dipyridinium ion) and paraquat2+ (1,1′-dimethyl-4,4′-dipyridinium ion) were competitively adsorbed by Na-saturated kaolinites, smectites and expanded and collapsed vermicu...