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Genetic, Physico-Chemical and Mineralogical Characterization of the Ngozi and Matongo Kaolins, Respectively in Northern and Central Parts of Burundi
Genetic Physico-Chemical Mineralogical Characterization Ngozi Matongo Kaolins
2012/3/14
Genetic, Physico-Chemical and Mineralogical Characterization of the Ngozi and Matongo Kaolins, Respectively in Northern and Central Parts of Burundi.
Hydroxyl Deformation in Kaolins
Deformation Mode Dickite FT Raman Halloysite Hydroxyl Infrared Intercalation Kaolinite Libration Reflectance
2011/12/8
Abstract: The hydroxyl deformation modes of kaolins have been studied by Fourier transform (FT) Raman spectroscopy. Kaolinites showed well-resolved bands at 959, 938 and 915 cm−1 and an addition...
Origin and Classification of Coastal Plain Kaolins, Southeastern USA, and the Role of Groundwater and Microbial Action
Bauxite Origin Kaolin Classification Kaolin Origin Microbial Weathering Weathering
2011/12/9
Abstract: Along the inner Coastal Plain, kaolinite-metahalloysite-rich, neritic muds of Cretaceous-Eocene age have undergone intense postdepositional alteration in the recharge area of the regional gr...
Identification of minor amounts of anatase in kaolins by Raman spectroscopy
Identification minor amounts anatase in kaolins Raman spectroscopy
2012/4/1
The Raman spectra of anatase, rutile, and brookite consist of several intense bands,
whereas kaolinite has only a weak Raman spectrum. Raman spectra of ten relatively pure
kaolin and two halloysite ...
Fe-Speciation in Kaolins: A Diffuse Reflectance Study
Diffuse reflectance spectroscopy Fe-speciation Kaolin Second derivative spectra
2011/12/28
Diffuse reflectance spectra of kaolins have been recorded in samples from different environments. They show the systematic presence of Fe-oxides, even in bleached kaolins, with no contribution from th...
Sedimentary Structure in Gray Kaolins of Georgia
Gray kaolin Kaolinite Sedimentary structure X-ray radiography
2011/12/31
One Tertiary and two Cretaceous gray kaolin sites in Georgia were examined using X-ray radiography of core sections to determine the processes of formation of the deposits. The Tertiary kaolin was oxi...
Mossbauer Spectra of Soil Kaolins from South-Western Australia
Iron Kaolin Mossbauer spectroscopy
2011/12/31
Six well-characterized soil kaolins from widely separated sites in south-western Australia and four reference kaolins were studied by 57Fe M鰏sbauer spectroscopy at room temperature after removal of no...
Genesis and Morphology of Iron Sulfides in Gray Kaolins
Kaolinite Marcasite Morphology Oxidation Pyrite Scanning electron microscopy Sulfide
2011/11/30
Abstract: Many of the presently oxidized Georgia kaolins probably existed originally in the reduced (gray) state. For that reason, the distribution of iron sulfides in presently gray kaolins may eluci...
Mineralogy, Crystallinity, O18/O16, and D/H of Georgia Kaolins
Crystallinity Hardness Isotope Kaolin Origin Oxygen isotopes
2012/1/13
Mineralogy, kaolin crystallinity, Fe content, 銸18, and 銬 were determined for late Cretaceous 搒oft?and early Tertiary 揾ard?Georgia kaolins. The crystallinity of the <0.5-, 0.5?.0-, and 1.0?.0- 祄 size f...
Apparent Charge Heterogeneity in Kaolins in Relation to Their 2:1 Phyllosilicate Content
Cation exchange Enthalpy Heat Kaolin Smectite Surface charge
2012/2/6
Measurements of the differential heats of K-Ca exchange are used to show that 6 groups of sites (ranging from −13.8 to −5.1 kJ/eq and with as many as 4 in any one sample) exist in kaolins ...
Kaolins: Sources of Differences in Cation-Exchange Capacities and Cesium Retention
Cation-exchange capacity Cs retention Interlayer wedges Kaolinite Vermiculite
2012/2/9
Seven kaolins from Georgia (southeastern U.S.A.), ranging from high to low commercial grade, were characterized by X-ray powder diffraction and chemical techniques to establish that the variation in q...
Electron Spin Resonance Studies of Iron Oxides Associated with the Surface of Kaolins
Goethite Hematite Iron Kaolin Lepidocrocite
2012/2/10
The different types of iron oxide phases associated with the surfaces of two suites of kaolins from Georgia, U.S.A., and from the Southwest Peninsula of England, have been identified using electron sp...
Scan Electron Micrographs of Kaolins Collected from Diverse Environments of Origin—V. Kaolins Collected in Australia and Japan on Field Trips of the Sixth and Seventh Clay Conferences
Scan Electron Micrographs Kaolins Diverse Environments Seventh Clay Conferences
2012/2/13
Scan electron micrographs are shown of the textures of flint clays, tonsteins, kaolin associated with combustion-metamorphism, sedimentary kaolin, and dickite from the Sydney Basin of Australia. The t...
Scan Electron Micrographs of Kaolins Collected from Diverse Origins—III. Influence of Parent Material on Flint Clays and Flint-Like Clays
Scan Electron Micrographs Kaolins Diverse Origins Flint-Like Clays
2012/2/13
The nature of the parent material from which flint clay or flint-like clay is derived may modify the texture of the clay as observed by SEM. Flint clays occurring in Pennsylvanian-age swamp basins int...
Scan Electron Micrographs of Kaolins Collected from Diverse Environments of Origin—II
Scan Electron Micrographs Kaolins Diverse Environments Origin—II
2012/2/13
Scan electron micrographs (SEM) show the textures of ball clay, plastic refractory clay, flint clay, and of kaolins from Cornwall, U.K., and Brittany, France. The texture of ball clay is a swirl and r...