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Clays and Clay Minerals

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Clays and Clay Minerals 9 records found  Search took 0.01 seconds. 
1.
17 p, 2.9 MB Characterization of alteration products in tephra from Haleakala, Maui : A visible-infrared spectroscopy, Mössbauer spectroscopy, XRD, EMPA and TEM study / Bishop, Janice L (NASA-Ames Research Center) ; Schiffman, Peter (Department of Geology. University of California) ; Murad, Enver (Bayerisches Landesamt für Umwelt) ; Dyar, M. Darby (Mount Holyoke College) ; Drief, Ahmed (The Clorox Company) ; Lane, Melissa D. (Planetary Science Institute)
Altered basaltic tephra from Haleakala, Maui, are characterized using multiple techniques in order to identify the minerals formed under a variety of conditions and to understand the soil formation processes here. [...]
2007 - 10.1346/CCMN.2007.0550101
Clays and Clay Minerals, Vol. 55, Núm. 1 (2007) , p. 1-17  
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2.
18 p, 3.8 MB Clay mineralogy and chemistry of halloysite and alunite deposits in the Turplu area, Balikesir, Turkey / Ece, Ö. Isik (Istanbul Technical University. Faculty of Mines. Department of Geological Sciences) ; Schroeder, Paul A. (The University of Georgia. Department of Geology)
A field-mapping and crystal-chemical study of two alunite- and halloysite-rich deposits in the Turplu area, situated northwest of Balikesir on the Biga Peninsula of northwest Turkey reveals a mineralogically diverse and a potentially economic clay deposit. [...]
2007 - 10.1346/CCMN.2007.0550102
Clays and Clay Minerals, Vol. 55, Núm. 1 (2007) , p. 18-35  
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3.
9 p, 898.1 KB Particle properties of hydrothermal ammonium-bearing illite-smectite / Šucha, Vladimír (Comenius University. Faculty of Natural Sciences) ; Uhlík, Peter (Comenius University. Faculty of Natural Sciences) ; Madejová, Jana (Slovak Academy of Sciences. Institute of Inorganic Chemistry) ; Petit, Sabine (Université de Poitiers) ; Kraus, Ivan (Comenius University. Faculty of Natural Sciences) ; Puškelová, L'Ubica (Slovak Academy of Sciences. Geological Institute)
Mixed-layer illite-smectite with high degree of ordering (rectorite-like clay) and with three types of interlayer cations - K, Na and NH , was detenrimed in the high-sulfide epithermal mineralization of the Western Carpathian Mountains. [...]
2007 - 10.1346/CCMN.2007.0550103
Clays and Clay Minerals, Vol. 55, Núm. 1 (2007) , p. 36-44  
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4.
14 p, 815.0 KB The nature of structure-bonded H2O in illite and leucophyllite from dehydration and dehydroxylation experiments / Drits, Victor A. (Russian Academy of Science. Geological Institute) ; McCarty, Douglas K. (Chevron ETC)
Thermogravimetric analysis combined with mass spectrometry was used to study HO bound to samples of illite-1M, illite-2M and leucophyllite-1M. Samples were heated in a helium atmosphere at different temperatures and after heating at each given temperature were cooled to 35°C. [...]
2007 - 10.1346/CCMN.2007.0550104
Clays and Clay Minerals, Vol. 55, Núm. 1 (2007) , p. 45-58  
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5.
12 p, 466.7 KB Formation of hard hematite-cemented solids in steam generators : An analog of lithification of Fe-containing sedimentary rocks / Labuda, Ewa (Sheppard T. Powell Associates. LLC) ; Cherepakhov, Galina (Consolidated Edison Co. New York Inc.) ; Barkatt, Aaron (The Catholic University of America)
The formation of hard hematite in steam generators with relatively high levels (5-10 μg/L) of dissolved oxygen at temperatures around 280-290°C and pressures around 6-8 MPa can serve as an analog for the formation of hard hematite in sedimentary processes. [...]
2007 - 10.1346/CCMN.2007.0550105
Clays and Clay Minerals, Vol. 55, Núm. 1 (2007) , p. 59-70  
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6.
18 p, 1.3 MB Kinetics of citrate-induced selenite desorption from montmorillonite as affected by complexation with hydroxyaluminum and hydroxyaluminosilicate ions / Saha, Uttam Kumar (University of Saskatchewan. Department of Soil Science) ; Kozak, L. M. (University of Saskatchewan. Department of Soil Science) ; Huang, P. M. (University of Saskatchewan. Department of Soil Science)
The citrate-induced desorption kinetics of pre-adsorbed Se from montmorillonite (Mt) and its complexes with hydroxyaluminum (HyA-Mt) and hydroxyaluminosilicate (HAS-Mt) were studied. The mole fraction of pre-adsorbed Se released in 24 h from different clays followed the trends of Mt≫HAS-Mt>HyA-Mt with a significant increase with elevated citrate concentration in the desorbing solution. [...]
2007 - 10.1346/CCMN.2007.0550106
Clays and Clay Minerals, Vol. 55, Núm. 1 (2007) , p. 71-88  
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7.
7 p, 370.6 KB Incorporation of Fe in the interlayer of Na-bentonite via treatment with FeCl3 in acetone / Komlósi, Andrea (University of Debrecen. Isotope Laboratory. Department of Colloid and Environmental Chemistry) ; Kuzmann, Ernö (Eötvös Loránd University. Research Group for Nuclear Methods in Structural Chemistry. Hungarian Academy of Sciences) ; Nagy, Noémi M. (University of Debrecen. Isotope Laboratory. Department of Colloid and Environmental Chemistry) ; Homonnay, Zoltán (Eötvös Loránd University. Research Group for Nuclear Methods in Structural Chemistry. Hungarian Academy of Sciences) ; Kubuki, Shiro (Ube National College of Technology) ; Kǒnya, Jósef (University of Debrecen. Isotope Laboratory. Department of Colloid and Environmental Chemistry.)
The effect of FeCl in acetonic medium on the structure of Na-bentonite was studied using X-ray diffraction (XRD), Fe Mössbauer spectroscopy, X-ray fluorescence spectroscopy and infrared spectroscopy to describe the structure of the bentonite before and after treatment. [...]
2007 - 10.1346/CCMN.2007.0550107
Clays and Clay Minerals, Vol. 55, Núm. 1 (2007) , p. 89-95  
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8.
12 p, 1.3 MB Nontronite particle aggregation induced by microbial Fe(III) reduction and exopolysaccharide production / Jaisi, Deb P. (Miami University. Department of Geology) ; Dong, Hailiang (Miami University. Department of Geology) ; Kim, Jinwook (Naval Research Laboratory) ; He, Ziqi (The Ohio State University. Department of Civil and Environmental Engineering and Geodetic Science) ; Morton, John P. (Miami University. Department of Geology)
Clay particle aggregation affects a number of environmental processes, such as contaminant sorption/desorption, particle movement/deposition, and sediment structure and stability, yet factors that control clay aggregation are not well understood. [...]
2007 - 10.1346/CCMN.2007.0550108
Clays and Clay Minerals, Vol. 55, Núm. 1 (2007) , p. 96-107  
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9.
7 p, 361.4 KB Phosphate and glyphosate adsorption by hematite and ferrihydrite and comparison with other variable-charge minerals / Gimsing, Anne Louise (The Royal Veterinary and Agricultural University. Department of Natural Sciences) ; Borggaard, Ole Kragholm (The Royal Veterinary and Agricultural University. Department of Natural Sciences)
Adsorption by synthetic 2-line ferrihydrite and hematite of glyphosate and phosphate, separately and together, was compared with adsorption results for goethite, gibbsite and two kaolinites in order to determine adsorption differences and similarities, in particular competition and phosphate preference, of these variable-charge minerals. [...]
2007 - 10.1346/CCMN.2007.0550109
Clays and Clay Minerals, Vol. 55, Núm. 1 (2007) , p. 108-114  
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