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RECONSTRUCTING PAST ANTARCTIC ICE FLOW PATHS IN THE ROSS EMBAYMENT, ANTARCTICA USING SAND PETROGRAPHY, PARTICLE SIZE AND DETRITAL ZIRCON PROVENANCE
Provenance Antarctica zircons Till
2015/1/16
Tills for this study were analyzed from sites in East Antarctica (EA), West Antarctica (WA) and along a transect in the Ross Sea. Particle size, sand petrography, and detrital zircons were used to pro...
Evolution of Fundamental-Particle Size during Illitization of Smectite and Implications for Reaction Mechanism
Crystal Growth Fundamental Particle Illite-Smectite Illitization Mechanism Lognormal Distribution Ostwald Ripening
2011/12/6
Abstract: Area-weighted thickness distributions of fundamental illite particles for samples of illite and illite-smectite from seven locations (including bentonites and hydrothermally altered pyroclas...
Mineral-Content and Particle-Size Effects on the Colloidal Properties of Concentrated Lateritic Suspensions
Concentrated Suspensions Heterocoagulation Interfacial Mobility Lateritic Suspensions Mineral Content of Suspensions Rheology Yield Stress
2011/12/7
Abstract: The rheological behavior of concentrated lateritic suspensions from Cuba is affected by mineral composition and particle size. Electrophoretic mobility and yield stress were considered. The ...
Particle size effects on transformation kinetics and phase stability in nanocrystalline TiO2
Particle size effects transformation kinetics phase stability nanocrystalline TiO2
2012/4/5
Kineticstudiesconductedprimarilybetween465and525Cdemonstratethattherate
ofthepolymorphicanatasetorutiletransformationincreasesdramaticallywhenthereact-
inganataseisvery?nelycrystalline.Coarseningoft...
Radiogenic Argon Released by Stepwise Heating of Glauconite and Illite: The Influence of Composition and Particle Size
Argon Dehydroxylation Glauconite Illite
2011/12/27
Various size fractions of several samples of glauconitic clay and illite were heated stepwise under vacuum for extended periods to: 1) evaluate radiogenic-argon (Ar) yields in relation to composition ...
Characterization of the Particle Size and the Crystallinity of Certain Minerals by IR Spectrophotometry and Other Instrumental Methods—II. Investigations on Quartz and Feldspar
Crystallinity Feldspar Grinding Orthoclase Quartz
2012/2/10
Infrared spectra of two minerals; Urkut quartz (Hungary) and a Swedish feldspar, of different origin with different physical characteristics and crystallinity were studied. Samples were taken after ap...
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...
The Birefringent Orientation and Relaxation of Clay Platelets as Affected by Particle Size, Saturating Cation and Clay Type
Birefringent Orientation Relaxation Clay Platelets Clay Type
2012/2/13
Previous work has shown that some clay particles orient at both low and high voltages due to a permanent dipole and an induced dipole, respectively, whereas other clays under similar short-duration pu...
Mineralogy and Cation Exchange Properties of Libby Vermiculite Separates as Affected by Particle-Size Reduction
Mineralogy Cation Exchange Properties Libby Vermiculite Particle-Size Reduction
2012/2/15
A vermiculite (Libby, Montana) sample obtained from the Zonolite company contained mostly coarse-grained separates with only 8? per cent clay. The 2?0 祄 fraction was used for particle-size reduction s...
Particle Size-Shape Relationships in Georgia Sedimentary Kaolins—II
Particle Size-Shape Relationships Georgia Sedimentary Kaolins
2012/2/15
Crude sedimentary kaolin clay from central Georgia, U.S.A., which had a wide distribution of particle size, was divided into several size fractions by repeated sedimentation in water. The resulting fr...
Effect of Particle Size on Potassium Sorption by Potassium-Depleted Phlogopite
Particle Size Potassium Sorption Potassium-Depleted Phlogopite
2012/2/15
Sorption of K from mixed KCl and CaCl2 solutions by K-depleted, Ca-saturated phlogopite was studied to determine the effect of particle size. The experiments were done at room temperature with 25 mg o...
Potassium Release from Muscovite as Influenced by Particle Size
Muscovite Particle Size Potassium Release
2011/11/17
Abstract: Completeness of exchange of K from muscovite by Ba2+ ions decreased with particle size below 20 ? Accompanying K exchange at 120癈, using a repeated batch technique, was a marked loss of Si a...
Formation of Hydroxy-Al and -Fe Interlayers in Montmorillonite and Vermiculite: Influence of Particle Size and Temperature
Formation Hydroxy-Al -Fe Interlayers Montmorillonite Vermiculite Particle Size Temperature
2012/2/21
Hydroxy-Al and -Fe interlayers were prepared in 乬mono-mineralic乭 fine and coarse clay montmorillonite and coarse clay and silt vermiculite at 3亱C and 21亱C. The formation of hydroxy interlayers was eva...
Compositional Variation of a Vermiculite as Related to Particle Size
Vermiculite Particle Size
2011/11/16
A vermiculite regolith sample from Llano, County, Texas, was divided into 16?2, 8?6, 4?, 2?, 1?, 綎1, 紪? 1 10 柤, and 5 100 ?1 10 micron equivalent spherical diameter size-classes. A well-crystallized v...