Results 191 to 200 of about 35,501 (220)
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Adsorption of Atrazine on Smectites
Soil Science Society of America Journal, 1992Abstract Smectites may strongly influence the fate of pesticides in soils due to their large surface area and abundance in agricultural soils. This research was undertaken to determine the effects of smectite properties on the affinity of smectitic clays for atrazine (2‐chloro‐4‐ethylamino‐6‐isopropylamino‐1, 3, 5
Laird, D.A. +3 more
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Chemistry of Smectitic and Illitic Phases in Interstratified Soil Smectite
Soil Science Society of America Journal, 1991Abstract The objective of this investigation was to determine the elemental composition and mineralogy of the smectitic and illitic phases in interstratified smectite‐illite from a typical upper Midwestern agricultural soil.
D. A. Laird +3 more
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Characterization of smectites synthesised from zeolites and mechanism of smectite synthesis
Clay Minerals, 1985AbstractSmectites were synthesised hydrothermally from zeolites in an Mg-rich brine at 300°C under a confining pressure of 30 MPa and characterized by XRD using the Greene-Kelley Li-saturation test and the K+-saturation/glycolation test. The synthetic smectites were found to be dioctahedral with only tetrahedral negative layer charge; the layer charge ...
S. Komarneni, E. Breval
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Pathways of Smectite Illitization
Clays and Clay Minerals, 1986AbstractJunction probability diagrams show variation in both composition and layer arrangement in mixed-layer clay minerals. These diagrams can represent short-range and long-range ordered, random, and segregated interstratifications. Mineralogical analyses of illite/smectite from shale cuttings, bentonites, and hydrothermally altered tuffs define ...
Craig M. Bethke +2 more
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Smectite suspension structural behaviour
International Journal of Mineral Processing, 2009Abstract Smectite suspensions, at low solids contents, are known to be naturally high in volume with diverse structural properties. The changing structural properties of smectite aqueous suspensions in the absence and presence of calcium ions were investigated using an acoustosizer and an advanced cryo-SEM technique to further understand and thereby ...
Zbik, Marek, Morris, Gayle
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Cation Exchange Selectivity Coefficient Values on Smectite and Mixed‐Layer Illite/Smectite Minerals
Soil Science Society of America Journal, 2009Sodium‐K, Na‐Ca, Na‐Mg, and Na‐Sr exchange isotherms were performed at a total Cl concentration of about 0.005 mol L −1 on the fine fraction (<2 μm) of MX80 montmorillonite, mixed‐layer illite smectite minerals (IS), and clayey stones from European underground research laboratories.
Tournassat, Christophe +5 more
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1978
Publisher Summary The chapter reveals that the montmorillonite is a specific mineral name of the smectite group. The mineralogy of montmorillonite and the geology and geochemistry of montmorillonite deposits have been investigated in detail. Montmorillonite deposits of economic importance are distributed only in Tertiary formations, especially in the
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Publisher Summary The chapter reveals that the montmorillonite is a specific mineral name of the smectite group. The mineralogy of montmorillonite and the geology and geochemistry of montmorillonite deposits have been investigated in detail. Montmorillonite deposits of economic importance are distributed only in Tertiary formations, especially in the
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Thermal Reactions of Smectites
Clay Minerals, 1956The thermal dehydration of a series of smectites has been investigated by X-ray methods. It has been found that the rate of collapse of the layers is governed by the type of exchangeable ion present. The high temperature changes of a new saponite have been investigated.
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Full Characterization of Smectites
2013Abstract Smectites are the most miscellaneous group of 2:1 clay minerals. Chemical and structural heterogeneity are typical for smectites, and both composition and structure are permanently subject to change in natural systems and technical applications.
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