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Clays and Clay Minerals

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Clays and Clay Minerals 16 records found  Search took 0.01 seconds. 
1.
22 p, 1.1 MB Crystal-chemical factors responsible for the distribution of octahedral cations over trans- and cis-sites in dioctahedral 2:1 layer silicates / Drits, Victor A. (Russian Academy of Science. Geological Institute) ; McCarty, Douglas K. (Chevron ETC) ; Zviagina, Bella B. (Russian Academy of Science. Geological Institute)
Crystal chemical analysis of various dioctahedral 2:1 phyllosilicates consisting of trans-vacant (tv) and cis-vacant (cv) layers and interstratified cv and tv layers shows that there is compositional control over the distribution of octahedral cations over trans and cis sites. [...]
2006 - 10.1346/CCMN.2006.0540201
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 131-152  
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2.
18 p, 1.7 MB Smectite formation in submarine hydrothermal sediments : Samples from the HMS Challenger expedition (1872-1876) / Cuadros, Javier (Natural History Museum. Department of Mineralogy) ; Dekov, Vesselin M. (University of Sofia. Department of Geology and Paleontology) ; Arroyo, Xabier (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Nieto, Fernando (Universidad de Granada. Departamento de Mineralogía y Petrología)
Clay processes, mineral reactions, and element budgets in oceans continue to be important topics for scientific investigation, particularly with respect to understanding better the roles of chemistry, formation mechanism, and input from hydrothermal fluids, seawater, and non-hydrothermal mineral phases. [...]
2011 - 10.1346/CCMN.2011.0590204
Clays and Clay Minerals, Vol. 59, Núm. 2 (2011) , p. 147-164  
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3.
12 p, 392.8 KB Nickel solubility and precipitation in soils : A thermodynamic study / Peltier, Edward (The University of Kansas. CEAE Department) ; Allada, Ramakumar (NASA Johnson Space Center) ; Navrotsky, Alexandra (University of California. Department of Chemical Engineering and Materials Science) ; Sparks, Donald L. (University of Delaware. Department of Plant and Soil Sciences)
The formation of mixed-metal-Al layered double hydroxide (LDH) phases similar to hydrotalcite has been identified as a significant mechanism for immobilization of trace metals in some environmental systems. [...]
2006 - 10.1346/CCMN.2006.0540202
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 153-164  
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4.
11 p, 344.8 KB Heating Fe oxide-rich soils increases the dissolution rate of metals / Perrier, Nicolas (Falconbrige) ; Gilkes, Robert J. (School of Earth and Geographical Sciences. UWA) ; Colin, Fabrice (IRD UMR 161. CEREGE UMR 6635)
Evidence for fire affecting the solubility of metals in Fe oxide-rich Oxisols of the Koniambo Massif of New Caledonia is presented. Acid-dissolution studies showed that Ni, Al and Cr are substituted for Fe in the structure of the Fe oxides. [...]
2006 - 10.1346/CCMN.2006.0540203
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 165-175  
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5.
19 p, 1.3 MB Thermal and mineral properties of A1-, Cr-, Mn-, Ni- and Ti-substituted goethite / Wells, M. A. (CSIRO Exploration and Mining. Australian Resources Research Centre) ; Fitzpatrick, R. W. (The University of Adelaide) ; Gilkes, R. J. (University of Western Australia. School of Earth and Geographical Sciences)
Mineralogical and thermal characteristics of synthetic Al-, Cr-, Mn-, Ni- and Ti-bearing goethites, synthesized via alkaline hydrolysis of metal-ferrihydrite gels, were investigated by powder X-ray diffraction and differential thermal analysis. [...]
2006 - 10.1346/CCMN.2006.0540204
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 176-194  
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6.
14 p, 485.8 KB Comparisons of structural Fe reduction in smectites by bacteria and dithionite : An infrared spectroscopic study / Lee, Kangwon (University of Illinois at Urbana-Champaign. Department of Natural Resources and Environmental Sciences) ; Kostka, Joel E. (Florida State University. Department of Oceanography) ; Stucki, Joseph W. (University of Illinois at Urbana-Champaign. Department of Natural Resources and Environmental Sciences)
The reduction of structural Fe in smectite is mediated either abiotically, by reaction with dithionite, or biotically, by Fe-reducing bacteria. The effects of abiotic reduction on clay-surface chemistry are much better known than the effects of biotic reduction. [...]
2006 - 10.1346/CCMN.2006.0540205
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 195-208  
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7.
11 p, 1.1 MB Identification of neoformed Ni-phyllosilicated upon Ni uptake in montmorillonite : A transmission electron microscopy and extended x-ray absorption fine structure study / Dähn, Rainer (Paul Scherrer Institut. Laboratory for Waste Management) ; Jullien, Michel (Commissariat à l'Énergie Atomique et aux Énergies Alternatives (França)) ; Scheidegger, Andrè M. (Paul Scherrer Institut. Laboratory for Waste Management) ; Poinssot, Christophe (Commissariat à l'Énergie Atomique et aux Énergies Alternatives (França)) ; Baeyens, Bart (Paul Scherrer Institut. Laboratory for Waste Management) ; Bradbury, Michael H. (Paul Scherrer Institut. Laboratory for Waste Management)
The aim of this work was to investigate whether neoformed Ni-phyllosilicates can be observed and identified using transmission electron microscopy (TEM) in combination with energy dispersive spectroscopy (EDS). [...]
2006 - 10.1346/CCMN.2006.0540206
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 209-219  
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8.
10 p, 1.2 MB Effect of acid treatment and alkali treatment on nanopore properties of selected minerals / Jozefaciuk, Grzegorz (Institute of Agrophysics. Polish Academy of Sciences) ; Matyka-Sarzynska, Dorota (Institute of Agrophysics. Polish Academy of Sciences)
Bentonite, biotite, illite, kaolin, muscovite, vermiculite and zeolite were acidified or alkalized with HCl or NaOH of concentrations 0. 0, 0. 1, 1. 0 and 5. 0 mole dm at room temperature for 2 weeks and converted into Ca homoionic forms. [...]
2006 - 10.1346/CCMN.2006.0540207
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 220-229  
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9.
10 p, 1.1 MB The effect of pressure on order/disorder in kaolinite under wet and dry conditions / Galán, Emilio (Universidad de Sevilla. Departamento de Cristalografía, Mineralogía y Química Agrícola) ; Aparicio, Patricia (Universidad de Sevilla. Departamento de Cristalografía, Mineralogía y Química Agrícola) ; La Iglesia, Angel (Universidad Complutense de Madrid. Instituto de Geología Económica) ; González, Isabel (Universidad de Sevilla. Departamento de Cristalografía, Mineralogía y Química Agrícola)
Well ordered kaolinite was isostatically and uniaxially pressurized up to 13,200 kg/cm for 10 min in dry conditions and the effects of pressure on kaolinite order were determined by analyzing the shapes of two-dimensional diffraction bands on X-ray powder diffraction patterns. [...]
2006 - 10.1346/CCMN.2006.0540208
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 230-239  
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10.
12 p, 1.3 MB Low-temperature hydrothermal alteration of silicic glass at the PACMANUS hydrothermal vent field, manus basin : An XRD, SEM and AEM-TEM study / Giorgetti, Giovanna (Università di Siena. Dipartimento di Scienze della Terra) ; Monecke, Thomas (University of Ottawa. Department of Earth Sciences) ; Kleeberg, Reinhard (TU Bergakademie Freiberg. Institut für Mineralogie) ; Hannington, Mark D. (University of Ottawa. Department of Earth Sciences.)
Dacitic lava recovered from the immediate subsurface of the submarine PACMANUS hydrothermal vent field exhibits variable degrees of hydrothermal alteration resulting from the interaction of the glassy volcanic rocks with mineralizing hydrothermal fluids at relatively low temperatures. [...]
2006 - 10.1346/CCMN.2006.0540209
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 240-251  
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11.
14 p, 931.1 KB Structural investigations of natural and synthetic chlorite minerals by x-ray diffraction, Mössbauer spectroscopy and solid-state nuclear magnetic resonance / Zazzi, Asa (Kungl. Tekniska högskolan (Estocolm (Suècia)) ; Hirsch, Tomas K. (Stanford Synchrotron Radiation Laboratory) ; Leonova, Ekaterina (Stockholm University. Physical Chemistry Division) ; Kaikkonen, Andrei (Stockholm University. Physical Chemistry Division) ; Grins, Jekabs (Stockholm University. Inorganic Chemistry Division) ; Annersten, Hans (Uppsala University. Department of Earth Sciences) ; Edén, Mattias (Stockholm University. Physical Chemistry Division)
The structures of one synthetic and two natural chlorites of the chlinochlore type were explored using X-ray diffraction, magic-angle spinning nuclear magnetic resonance (NMR) and Mössbauer spectroscopy. [...]
2006 - 10.1346/CCMN.2006.0540210
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 252-265  
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12.
8 p, 832.8 KB Detecting chlorite in the Chinese loess sequence by diffuse reflectance spectroscopy / Ji, Junfeng (Nanjing University) ; Zhao, Liang (Nanjing University) ; Balsam, William (University of Texas at Arlington) ; Chen, Jun (Nanjing University) ; Wu, Tao (Nanjing University) ; Liu, Lianwen (Nanjing University)
Chlorite is one of the most common Fe-bearing minerals and is susceptible to weathering in loess and soils. The conventional method for analyzing chlorite, based on XRD with the Rietveld technique, is quantitative, but very time consuming and expensive. [...]
2006 - 10.1346/CCMN.2006.0540211
Clays and Clay Minerals, Vol. 54, Núm. 2 (2006) , p. 266-273  
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13.
11 p, 1.3 MB Quantification of hematite and goethite concentrations in kaolin using diffuse reflectance spectroscopy : A new approach to Kubelka-Munk theory / Gonçalves, Ítalo Gomes (Universidade Federal do Rio Grande do Sul. Laboratório de Processamento Mineral. Departamento de Engenharia de Minas) ; Petter, Carlos Octávio (Universidade Federal do Rio Grande do Sul. Laboratório de Processamento Mineral. Departamento de Engenharia de Minas) ; Lepkoski Machado, Jaqueline (Universidade Federal do Rio Grande do Sul. Laboratório de Processamento Mineral. Departamento de Engenharia de Minas)
Kaolin ores are usually contaminated by some Fe-bearing minerals, the strong colors of which degrade the quality of the final product. A spectroscopic technique is sought to quantify the content of hematite and goethite, the main contaminant minerals in the kaolin from Capim River in Brazil, was the focus of this study. [...]
2012 - 10.1346/CCMN.2012.0600504
Clays and Clay Minerals, Vol. 60, Núm. 5 (2012) , p. 473-483  
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14.
16 p, 1.1 MB Bioavailability of Fe(III) in loess sediments : An important source of electron acceptors / Bishop, Michael E. (Miami University. Department of Geology) ; Jaisi, Deb P. (Yale University. Department of Geology and Geophysics) ; Dong, Hailiang (China University of Geosciences. Key Laboratory of Biogeology and Environmental Geology of Ministry of Education.) ; Kukkadapu, Ravi K. (Pacific Northwest National Laboratory) ; Ji, Junfeng (Nanjing University. Department of Earth Sciences)
Fe-reducing micro-organisms can change the oxidation state of structural Fe in clay minerals. The interactions with complex clays and clay minerals in natural materials remain poorly understood, however. [...]
2010 - 10.1346/CCMN.2010.0580409
Clays and Clay Minerals, Vol. 58, Núm. 4 (2010) , p. 542-557  
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15.
6 p, 197.6 KB The influence of acid treatment on the composition of bentonite / Vuković, Zorica (Institute of Chemistry Technology and Metallurgy. Department of Catalysis and Chemical Engineering) ; Milutonović, Aleksandra (Institute of Chemistry Technology and Metallurgy. Department of Catalysis and Chemical Engineering) ; Rožić, Ljiljana (Institute of Chemistry Technology and Metallurgy. Department of Catalysis and Chemical Engineering) ; Rosić, Aleksandra (Faculty of Mining and Geology) ; Nedić, Zoran (Faculty of Physical Chemistry) ; Jovanović, Dusan (Institute of Chemistry Technology and Metallurgy. Department of Catalysis and Chemical Engineering)
Bentonite from the 'Bogovina' coal mine in Serbia, was characterized. The influence of acid treatment on its composition, as well as mathematical descriptions of this influence are reported. The purpose of this work was to correlate the concentration of the acid used for the treatment with the resulting bentonite composition. [...]
2006 - 10.1346/CCMN.2006.0540605
Clays and Clay Minerals, Vol. 54, Núm. 6 (2006) , p. 697-702  
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16.
6 p, 669.0 KB Illitization of kaolinite : the effect of pressure on the reaction rate / Mantovani, Marco (Instituto de Ciencia de Materiales de Sevilla) ; Becerro, Ana Isabel (Instituto de Ciencia de Materiales de Sevilla)
Studies of the paragenesis of authigenic illite in arkosic sandstones of various regions and ages have revealed that the illitization of kaolinite is an important reaction accounting for the formation of authigenic illite in sandstones during burial diagenesis. [...]
2010 - 10.1346/CCMN.2010.0580604
Clays and Clay Minerals, Vol. 58, Núm. 6 (2010) , p. 766-771  
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