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Clays and Clay Minerals

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Clays and Clay Minerals Encontrados 13 registros  La búsqueda tardó 0.01 segundos. 
1.
11 p, 1.2 MB The transformation of synthetic hectorite in the presence of Cu(II) / Fischer, Hakon (ETH Zurich. Institute of Geophysics) ; Weidler, Peter G. (Institute for Technical Chemistry. Water- and Geotechnology. Forschungszentrum Karlsruhe) ; Grobéty, Bernard (Université de Fribourg. Institut de Minéralogie) ; Luster, Jörg (Swiss Federal Institute for Forest, Snow, and Landscape Research WSL) ; Gehring, Andreas U. (ETH Zurich. Institute of Geophysics)
The influence of Cu(II) on the hydrothermal and thermal transformations of a synthetic hectorite was investigated by a combined approach using mainly X-ray diffraction, thermal analyses, and electron paramagnetic resonance spectroscopy. [...]
2009 - 10.1346/CCMN.2009.0570201
Clays and Clay Minerals, Vol. 57, Núm. 2 (2009) , p. 139-149  
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2.
11 p, 2.1 MB Swelling behavior of Na- and Ca-montmorillonite up to 150°c by in situ x-ray diffraction experiments / Morodome, Shoji (Tokyo Institute of Technology. Department of Earth and Planetary Science) ; Kawamura, Katsuyuki (Tokyo Institute of Technology. Department of Earth and Planetary Science)
The effects of temperature on the swelling properties of smectites are important for a variety of different geological conditions, but studies on this topic have been rather limited. The purpose of this study was to investigate the swelling behavior of Na- and Ca-montmorillonite at various temperatures greater than room temperature, up to 150°C, using in situ X-ray diffraction (XRD) analysis. [...]
2009 - 10.1346/CCMN.2009.0570202
Clays and Clay Minerals, Vol. 57, Núm. 2 (2009) , p. 150-160  
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3.
15 p, 852.4 KB Chemostratigraphic correlation of sediments containing expandable clay minerals based on ion exchange with cu(II) triethylenetetramine / Grygar, Tomás (Institute of Inorganic Chemistry of the AS CR) ; Kadlec, Jaroslav (Institute of Geology AS CR) ; Žigová, Anna (Institute of Geology AS CR) ; Mihaljevič, Martin (Charles University. Mineralogy and Mineral Resources) ; Nekutová, Tereza (Charles University. Mineralogy and Mineral Resources) ; Lojka, Richard (Czech Geological Survey) ; Světlík, Ivo (Nuclear Physics Institute AS CR)
Copper(II) triethylenetetramine [Cu(trien)] is an agent suitable for the 1-step determination of the cation exchange capacity (CEC) of many geomaterials using a procedure much less laborious than other, commonly used methods. [...]
2009 - 10.1346/CCMN.2009.0570204
Clays and Clay Minerals, Vol. 57, Núm. 2 (2009) , p. 168-182  
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4.
11 p, 1.1 MB Crystallographic features and cleavage nanomorphology of chlinochlore : Specific applications / Valdré, Giovanni (Universitá di Bologna. Dipartimento di Scienze della Terra e Geologico-Ambientali) ; Malferrari, Daniele (Universitá di Modena e Reggio Emilia. Dipartimento di Scienze della Terra) ; Brigatti, Maria Franca (Universitá di Modena e Reggio Emilia. Dipartimento di Scienze della Terra)
Natural and synthetic micas have been used widely as substrates to study biological systems; but, as in the case of negatively charged DNA, anionic charge repulsion may render micas a less than ideal templating surface for many biological systems. [...]
2009 - 10.1346/CCMN.2009.0570205
Clays and Clay Minerals, Vol. 57, Núm. 2 (2009) , p. 183-193  
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5.
11 p, 2.4 MB Interlayer conformations of intercalated dodecyltrimethylammonium in rectorite as determined by ftir, xrd, and tg analyses / Li, Zhaohui (National Cheng Kung University. Department of Earth Sciences) ; Jiang, Wei-Teh (National Cheng Kung University. Department of Earth Sciences)
Intercalation of a wide variety of alkylammonium cations into the interlayer spaces of swelling clay minerals leads to many different applications, ranging from surface-charge measurements to rendering the clay compatible for the preparation of clay nanocomposites, but knowledge of the exact conformation of the intercalated organic species is still incomplete, thus preventing a full understanding of this process. [...]
2009 - 10.1346/CCMN.2009.0570206
Clays and Clay Minerals, Vol. 57, Núm. 2 (2009) , p. 194-204  
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6.
14 p, 1.1 MB The role of clay minerals in the preservation of organic matter in sediments of qinghai lake, NW China / Yu, Bingsong (China University of Geosciences) ; Dong, Hailiang (Miami University. Department of Geology) ; Jiang, Hongchen (Miami University. Department of Geology) ; Lv, Guo (China University of Geosciences) ; Eberl, Dennis (US Geological Survey) ; Li, Shanying (China University of Geosciences) ; Kim, Jinwook (Yonsei University)
The role of saline lake sediments in preserving organic matter has long been recognized. In order to further understand the preservation mechanisms, the role of clay minerals was studied. Three sediment cores, 25, 57, and 500 cm long, were collected from Qinghai Lake, NW China, and dissected into multiple subsamples. [...]
2009 - 10.1346/CCMN.2009.0570208
Clays and Clay Minerals, Vol. 57, Núm. 2 (2009) , p. 213-226  
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7.
7 p, 473.8 KB Polarized ATR-FTIR investigation of Fe reduction in the uley nontronites / Bzdek, Bryan R. (Bucknell University. Department of Chemistry) ; McGuire, Molly M. (Bucknell University. Department of Chemistry)
Reduction of structural Fe in smectites affects the surface chemical behavior of the clay, but the underlying mechanism and changes in clay structure are still in need of investigation, particularly with respect to changes in the tetrahedral sheet. [...]
2009 - 10.1346/CCMN.2009.0570209
Clays and Clay Minerals, Vol. 57, Núm. 2 (2009) , p. 227-233  
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8.
17 p, 1.4 MB Simultaneous incorporation of Cr, Zn, Cd, and Pb in the goethite structure / Kaur, Navdeep (The University of Sydney. Food and Natural Resources) ; Gräfe, Markus (The University of Sydney. Food and Natural Resources) ; Singh, Balwant (The University of Sydney. Food and Natural Resources) ; Kennedy, Brendan (The University of Sydney. School of Chemistry)
In order to improve our understanding of how the goethite crystal structure is affected by the incorporation of metals (and by variations in the amount of the incorporation), and to review any possible synergistic and antagonistic effects of co-metals, the present investigation focused on the incorporation of multiple (di-, tri-, and tetra-) metals, i. [...]
2009 - 10.1346/CCMN.2009.0570210
Clays and Clay Minerals, Vol. 57, Núm. 2 (2009) , p. 234-250  
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9.
13 p, 1.8 MB Anisotropy of magnetic susceptibility study of kaolinite matrix subjected to biaxial tests / Sengupta, Aniruddha (Indian Institute of Technology. Department of Civil Engineering)
The potential for structural failure of consolidated clay materials, which is of great importance in many applications, typically are assessed by measuring the localized strain bands that develop under anisotropic load stress. [...]
2009 - 10.1346/CCMN.2009.0570211
Clays and Clay Minerals, Vol. 57, Núm. 2 (2009) , p. 251-263  
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10.
7 p, 673.2 KB Mineralogical and physicochemical investigation of mg-smectite from jbel ghassoul, Morocco / Benhammou, Abdelaziz (Université Cadi Ayyad. Ecole Nationale des Sciences Appliquées) ; Tanouti, Boumediene (Université Cadi Ayyad. Faculté des Sciences Semlalia) ; Nibou, Lahbib (Université Cadi Ayyad. Ecole Nationale des Sciences Appliquées) ; Yaacoubi, Abdelrani (Université Cadi Ayyad. Faculté des Sciences Semlalia) ; Bonnet, Jean-Pierre. (ENSCI. Groupe d'Etude des Matériaux Hétérogènes)
'Ghassoul' clay is a Mg-rich clay from Morocco which is of great industrial use and interest, but its characterization is still incomplete. The purpose of this study was to provide further details regarding the structure and characteristics of this important commercial clay mineral. [...]
2009 - 10.1346/CCMN.2009.0570212
Clays and Clay Minerals, Vol. 57, Núm. 2 (2009) , p. 264-270  
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11.
7 p, 177.2 KB Melt synthesis and characterization of synthetic Mn-rich tainiolite / Baumgartner, Alexander (University of Bayreuth. Department of Inorganic Chemistry I) ; Butterhof, Christian (University of Bayreuth. Department of Inorganic Chemistry I) ; Koch, Sebastian (University of Bayreuth. Department of Inorganic Chemistry I) ; Mariychuk, Ruslan (University of Bayreuth. Department of Inorganic Chemistry I) ; Breu, Josef (University of Bayreuth. Department of Inorganic Chemistry I)
Large transition-metal contents add desirable physical properties, such as redox reactivity, magnetism, and electric or ionic conductivity to micas and make them interesting for a variety of materials-science applications. [...]
2009 - 10.1346/CCMN.2009.0570213
Clays and Clay Minerals, Vol. 57, Núm. 2 (2009) , p. 271-277  
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12.
Deformation-promoted defects and retrograde chloritization of biotite in slates from a shear zone, Southern Iberian Massif, SE Spain / Jiménez-Millán, Juan (Universidad de Jaén. Departamento de Geologia) ; Vázquez, Mercedes (Universidade de Aveiro. Departamento de Geociencias) ; Velilla, Nicolás (Universidad de Granada. Departamento de Mineralogía y Petrología)
Naturally deformed biotite in contact-metamorphosed slates affected by a shear zone of the Southern Iberian Massif near Jaén (SE Spain) were studied by X-ray diffraction, optical microscopy, scanning electron microscopy, electron probe microanalysis and high-resolution transmission and analytical electron microscopy. [...]
2007 - 10.1346/CCMN.2007.0550305
Clays and Clay Minerals, Vol. 55, Núm. 3 (2007) , p. 284-294  
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13.
Guidottiite, the mn-analogue of cronstedtite : A new serpentine-group mineral from south africa / Wahle, Michael W. (University of Illinois at Chicago. Department of Earth and Environmental Sciences) ; Bujnowski, Thomas J. (University of Illinois at Chicago. Department of Earth and Environmental Sciences) ; Guggenheim, Stephen (University of Illinois at Chicago. Department of Earth and Environmental Sciences) ; Kogure, Toshihiro (The University of Tokyo. Department of Earth and Planetary Science)
The objective of this paper is to describe the new serpentine group mineral, guidottiite, which is analogous to cronstedtite. Guidottiite has an ideal chemical composition of (MnFe)(SiFe)O(OH)4. The sample is from the N'chwaning 2 mine, Kalahari manganese field, Republic of South Africa, and apparently forms from hydrothermal solutions. [...]
2010 - 10.1346/CCMN.2010.0580307
Clays and Clay Minerals, Vol. 58, Núm. 3 (2010) , p. 364-376  
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