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Resultats globals: 12 registres trobats en 0.04 segons.
Articles, 12 registres trobats
Articles 12 registres trobats  1 - 10següent  anar al registre:
1.
11 p, 161.0 KB Clay profiling : The classification of montmorillonites / Emmerich, Katja (Forschungszentrum Karlsruhe. Competence Center for Material Moisture. University of Karlsruhe) ; Wolters, Felicitas ; Kahr, Guenter (ETH Zürich. Institute of Geotechnical Engineering) ; Lagaly, Gerhard (University of Kiel. Institute of Inorganic Chemistry)
Montmorillonites, with the general composition M (SiAl) [(Al,Fe) (Mg,Fe)] O(OH) where x = ξ = 0. 2a0. 6, x = y+z, and y«z, vary widely in composition and structure. The commonly used classification into five montmorilloniteand two beidellitegroups for the solid-solution sequence does not allow an unambiguous classification with respect to structural features and the resulting properties. [...]
2009 - 10.1346/CCMN.2009.0570110
Clays and Clay Minerals, Vol. 57, Núm. 1 (2009) , p. 104-114  
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2.
19 p, 542.5 KB A comprehensive characterization of dioctahedral smectites / Wolters, Felicitas (Forschungszentrum Karlsruhe GmbH. Institute for Technical Chemistry) ; Lagaly, Gerhard (University of Kiel. Institute of Inorganic Chemistry) ; Kahr, Guenter (ETH Zürich. Institute for Geotechnical Engineering) ; Nueesch, Rolf ; Emmerich, Katja (University of Karlsruhe. Competence Center for Material Moisture)
The term 'montmorillonite' encompasses a wide range of chemical compositions and structures. Comprehensive and reliable characterization is essential for unambiguous classification. Twenty eight purified, Na-exchanged smectites (<0. [...]
2009 - 10.1346/CCMN.2009.0570111
Clays and Clay Minerals, Vol. 57, Núm. 1 (2009) , p. 115-133  
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3.
23 p, 1.4 MB The charge of component layers of illite-smectite in bentonites and the nature of end-member illite / Środoń, Jan (Institute of Geological Sciences PAN) ; Zeelmaekers, Edwin (University of Leuven. Laboratory for Applied Geology and Mineralogy) ; Derkowski, Arkadiusz (Institute of Geological Sciences PAN)
The nature of component layers of mixed-layer illite-smectite and their possible evolution in the course of illitization have been debated since the 1960s. The present study is a new attempt to solve these problems, using samples collected from diverse geological formations around the world. [...]
2009 - 10.1346/CCMN.2009.0570511
Clays and Clay Minerals, Vol. 57, Núm. 5 (2009) , p. 649-671  
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4.
20 p, 288.5 KB Surface area and layer charge of smectite from CEC and EGME/H2O-retention measurements / Środoń, Jan (Institute of Geological Sciences PAN) ; McCarty, Douglas K. (Chevron ETC)
The total specific surface area (TSSA) and smectitic layer charge (Q) calculated from the structural formulae and unit-cell dimensions of 12 pure smectite samples were used as a reference in the design and evaluation of TSSA and Q measurement techniques based on cation exchange capacity (CEC), HO retention at 47% RH, and ethylene glycol monoethyl ether (EGME) retention. [...]
2008 - 10.1346/CCMN.2008.0560203
Clays and Clay Minerals, Vol. 56, Núm. 2 (2008) , p. 155-174  
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5.
10 p, 722.3 KB Surface properties of illite-smectite minerals as detected by interactions with Rhodamine 6G dye / Šucha, Vladimír (Comenius University. Department of Geology of Mineral Deposits) ; Czímerová, A. (Slovak Academy of Science. Institute of Inorganic Chemistry) ; Bujdák, J. (Slovak Academy of Science. Institute of Inorganic Chemistry)
Interactions between smectite clay minerals and various organic dyes have been studied extensively, but little information has accumulated from dye interactions with mixed-layer illite-smectite (I-S) minerals, especially regarding relationships with clay layer expandability, layer charge, particle size/shape, and molecular aggregation of organic dye molecules. [...]
2009 - 10.1346/CCMN.2009.0570308
Clays and Clay Minerals, Vol. 57, Núm. 3 (2009) , p. 361-370  
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6.
16 p, 992.3 KB Layer-charge characteristics of smectite in thai vertisols / Chittamart, Natthapol (Kasetsart University. Department of Soil Science) ; Suddhiprakarn, Anchalee (Kasetsart University. Department of Soil Science) ; Kheoruenromne, Irb (Kasetsart University. Department of Soil Science) ; Gilkes, Robert J. (University of Western Australia. School of Earth and Environment)
The fertility of soils with respect to K and NH is often difficult to measure, but is essential for achieving effective agronomic practices. This problem is especially important in the Vertisols of Thailand. [...]
2010 - 10.1346/CCMN.2010.0580209
Clays and Clay Minerals, Vol. 58, Núm. 2 (2010) , p. 247-262  
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7.
13 p, 751.0 KB Approach to a descriptive model of charge reduction in vermiculite by hydrothermal treatment / Campos, Ana M. (Universidad Jorge Tadeo Lozano. Departamento de Ciencias Básicas) ; Moreno, Sonia (Universidad Nacional de Colombia. Departamento de Química) ; Molina, Rafael (Universidad Nacional de Colombia. Departamento de Química)
Vermiculites have the potential to serve as effective catalysts if pillared with Al, but their high charge presents an obstacle to the pillaring process. The purpose of this studywas to submit natural vermiculite to thermal treatments in the presence of water vapor in order to effect a reduction in the global negative charge and therebyto enhance its susceptibilityto pillaring. [...]
2010 - 10.1346/CCMN.2010.0580110
Clays and Clay Minerals, Vol. 58, Núm. 1 (2010) , p. 97-109  
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8.
13 p, 1.2 MB Al-saturated phlogopite : Charge considerations and crystal chemistry / 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) ; Brigatti, Maria Franca (Università di Modena e Reggio Emilia. Dipartimento di Scienze della Terra)
Factors controlling the crystal structure of phlogopite have been widely investigated; but the role of electrostatic interactions, for example, has received much less attention than other factors. The purpose of the present study was to peform a single-crystal refinement of an Al-saturated phlogopite and to use that refinement to supplement crystal-chemical analyses. [...]
2009 - 10.1346/CCMN.2009.0570601
Clays and Clay Minerals, Vol. 57, Núm. 6 (2009) , p. 673-685  
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9.
13 p, 1.7 MB The determinative role of the exchange cation and layer-charge density of smectite on aflatoxin adsorption / Deng, Youjun (Texas A and M University. Department of Soil and Crop Sciences) ; Liu, Lian (Texas A and M University. Department of Soil and Crop Sciences) ; Velázquez Barrientos, Ana Luisa (Texas A and M University. Department of Soil and Crop Sciences) ; Dixon, Joe B. (Texas A and M University. Department of Soil and Crop Sciences)
Using bentonites to adsorb aflatoxin is an effective method of minimizing the toxicity of aflatoxin to animals and humans. Early studies indicated a more than 10-fold difference in aflatoxin adsorption capacity among different bentonites. [...]
2012 - 10.1346/CCMN.2012.0600404
Clays and Clay Minerals, Vol. 60, Núm. 4 (2012) , p. 374-386  
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10.
12 p, 770.6 KB Layer charge density of smectites - Closing the gap between the structural formula method and the alkyl ammonium method / Kaufhold, Stephan (BGR Bundesanstalt für Geowissenschaften und Rohstoffe) ; Dohrmann, Reiner (LBEG Landesamt für Bergbau. Energie und Geo logie) ; Stucki, Joseph W. (University of Illinois. Department of Natural Resources and Environmental Sciences) ; Anastácio, Alexandre S. (University of Illinois. Department of Natural Resources and Environmental Sciences)
The layer charge density (LCD) of montmorillonite represents the permanent negative charge, its most important property. The LCD can be determined by two different methods, the structural formula method(SF M) and the alkylammonium method(AAM). [...]
2011 - 10.1346/CCMN.2011.0590208
Clays and Clay Minerals, Vol. 59, Núm. 2 (2011) , p. 200-211  
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Articles : 12 registres trobats   1 - 10següent  anar al registre:
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