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Semiquantitative Chemical Analysis of Asbestos Fibers and Clay Minerals with an Analytical Electron Microscope
Amphibole Asbestos Chrysotile Morphology Structure
2012/2/10
By using a transmission electron microscope equipped with an energy dispersive spectrometer, it was possible to detect the morphological, structural, and chemical characteristics of individual asbesto...
A Study of the Adsorption of Ni(II) and Cu(II) by Clay Minerals
Adsorption Ni(II) Cu(II) Clay Minerals clay minerals kaolinite
2012/2/13
The adsorption of Ni(II) and Cu(II) on to the clay minerals kaolinite, chlorite, and illite has been investigated. The quantity of Ni(II) at pH 6 and Cu(II) at pH 5 adsorbed has been found to vary in ...
Characterization of the Particle Size and the Crystallinity of Certain Minerals by Infrared Spectrophotometry and Other Instrumental Methods—I. Investigations on Clay Minerals
Particle Size Clay Minerals Crystallinity structural water kaolinites
2012/2/13
Effects of particle size, crystallinity and the amount of the structural water in kaolinites on their infrared spectra, were studied. The samples were ground in a vibrating ball-mill, and infrared and...
A study was undertaken to investigate the adsorption of hemin, protoporphyrin and hematoporphyrin by kaolinite and a Ca-montmorillonite in aqueous solutions buffered at pH 4 and 9.Although experimenta...
Flouride Content of Clay Minerals and Argillaceous Earth Materials
Flouride Content Clay Minerals Argillaceous Earth Materials
2012/2/13
A reliable method, utilizing a fluoride ion-selective electrode, is described for the determination of fluoride in clays and shales. Interference by aluminum and iron is minimal. The reproducibility o...
FLUORIDE CONTENT OF CLAY MINERALS AND ARGILLACEOUS EARTH MATERIALS
CLAY MINERALS ARGILLACEOUS EARTH MATERIALS
2011/11/15
A reliable method, utilizing a fluoride ion-selective electrode, is described for the determination of fluoride in clays and shales. Interference by aluminum and iron is minimal. The reproducibility o...
Analysis of Iron-Bearing Clay Minerals by Electron Spectroscopy for Chemical Analysis (ESCA)
Clay Minerals Electron Spectroscopy Chemical Analysis (ESCA)
2012/2/13
Nontronite and biotite were analyzed by Electron Spectroscopy for Chemical Analysis (ESCA). Both minerals yielded ESCA spectra with well-defined peaks and the elements identified by the ESCA spectra w...
Diagenesis of Clay Minerals from Lower Cretaceous Shales of North Eastern British Columbia
Diagenesis Clay Minerals Lower Cretaceous Shales North Eastern British Columbia
2012/2/15
Clay minerals from shale outcrops of the Lower Cretaceous Buckinghorse Formation (4250 ft thick) were investigated in order to assess their degree of diagenesis and their oil-generating potential. Cry...
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...
An Ultraviolet Spectroscopic Method for Monitoring Surface Acidity of Clay Minerals under Varying Water Content
Monitoring Surface Clay Minerals Varying Water Content
2012/2/15
The ability of a clay mineral surface to function as an acid is not represented by bulk pH measurements. A method using u.v. analysis and organic indicators has been developed to monitor surface acidi...
Elementary Layers in the Interstratified Clay Minerals as Revealed by Electron Microscopy
Elementary Layers Clay Minerals Electron Microscopy
2012/2/15
Interstratified layer structures were studied by electron microscopy and electron diffraction. In order to distinguish between expansible and non-expansible layers, interstratified mica-smectite was t...
The Alteration of Some Aromatic Amino Acids and Polyhydric Phenols by Clay Minerals
Aromatic Amino Acids Alteration Polyhydric Phenols Clay Minerals
2012/2/15
These studies concern the catalytic activity of clays on amino acids, particularly tyrosine. Polyhydric phenols were included to help understand the tyrosine reactions.Below pH 3, tyrosine is adsorbed...
OPTICAL ABSORPTION SPECTRA OF CLAY MINERALS
OPTICAL ABSORPTION SPECTRA CLAY MINERALS Attapulgite
2011/11/16
preliminary survey of electronic absorption spectra of clay minerals reveals the utility of u.v.-visible spectroscopy in the elucidation of structural, physical, and chemical properties of such system...
Selective Sorption and Fixation of Cations by Clay Minerals: A Review
Selective Sorption Fixation of Cations Clay Minerals Review
2012/2/15
Investigations concerning selective sorption and fixation of K and similar cations by clay minerals and soil clays and the mechanisms of these reactions are reviewed. In particular, recent observation...
A Comparative Study of the Diagenetic Alteration of Clay Minerals in Mesozoic Shales from Papua, New Guinea, and in Tertiary Shales from Louisiana, U.S.A.
Diagenetic Alteration Clay Minerals Mesozoic Shales
2011/11/17
Abstract: Gradual change from 60% montmorillonite/40% illite randomly interstratified clay minerals at 3500 ft depth to 20% montmorillonite/80% illite at 10,200 ft can be observed in a complete sectio...