Cambridge University Press (CUP)

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Lithium-Bearing Donbassite and Tosudite from Echassières, Massif Central, France
Cambridge University Press (CUP) - - 1988
Thierry Merceron, Atsuyuki Inoue, A Bouchet, Alain Meunier
AbstractLithium-bearing donbassite and tosudite were found in veins in hydrothermally altered granite (Beauvoir granite) in the northern part of the Massif Central, France. The two minerals are characterized by their high Li contents and low Mg and Fe contents; their structural formulae are: $${\left( {S{i_{3.8...... hiện toàn bộ
Kaolinite to halloysite-7 Å transformation in the kaolin deposit of São Vicente de Pereira, Portugal
Cambridge University Press (CUP) - Tập 49 - Trang 596-607 - 2001
Iuliu Bobos, Joelle Duplay, João Rocha, Celso Gomes
The transformation of kaolinite to halloysite-7 Å was identified in the kaolin deposit of São Vicente de Pereira (SVP), using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). Both the 02, 1̄ and 13̄, 13 reflections show changes in the XRD patterns along the kaolinite to halloysite-7 Å transition, and the FTIR spectra show changes c...... hiện toàn bộ
Preparation and Properties of Some Polymer-Clay Compounds
Cambridge University Press (CUP) - Tập 12 - Trang 603-616 - 1963
Henri G. G. Dekking
Novel polymer-clay compositions were synthesized by neutralizing hydrogen montmorillonite and hydrogen kaolinite with amine-terminated polystyrene. The latter was obtained by the amide ion-initiated polymerization of styrene in liquid ammonia at −33°C. The neutralization reactions were carried out in methyl ethyl ketone, acetone, N,N-dimethylformamide and their aqueous solutions. As a result of th...... hiện toàn bộ
Simultaneous Intercalation of Two Quaternary Phosphonium Salts Into Montmorillonite
Cambridge University Press (CUP) - Tập 59 - Trang 13-20 - 2011
Saheli Ganguly, Kausik Dana, Tapas Kumar Mukhopadhyay, Sankar Ghatak
Intercalation of montmorillonites with a mixture of intercalates has not been studied extensively. The objective of the present investigation was to study the effects of phosphonium-based intercalate mixtures on the properties (organic loading and basal spacing) of montmorillonite. These phosphonium-intercalated montmorillonites are promising candidates as high-temperature stable nanofillers for a...... hiện toàn bộ
Effects of Octahedral-Iron Reduction and Swelling Pressure on Interlayer Distances in Na-Nontronite
Cambridge University Press (CUP) - Tập 37 - Trang 211-218 - 1989
Jun Wu, P. F. Low, C. B. Roth
A new type of environmental chamber for X-ray diffraction was designed that could sustain elevated, internal pressures of nitrogen or any other gas under oxygen-free conditions and that allowed the positions of the specimen and edge aperture to be adjusted by remote control. It was used to determine the values of the interlayer spacing, λ, of nontronite from Garfield, Washington, in different stag...... hiện toàn bộ
Influence of silicate- and magnesium-specific adsorption and particle shape on the rheological behavior of mixed serpentine-goethite suspensions
Cambridge University Press (CUP) - - 2002
P. Tartaj, A. Cerpa, M. T. García-González, C. J. Serna
The influence of dissolved species and particle morphology on the electrokinetic behavior and the initial yield stress values of Cuban lateritic aqueous suspensions was studied. The lateritic samples were mixtures of serpentine and goethite in different relative proportions. The addition of silicate and Mg ionic species, which are normally found in natural waters used in industrial processes, affe...... hiện toàn bộ
Layer Charge Relations in Clay Minerals of Micaceous Soils and Sediments
Cambridge University Press (CUP) - Tập 14 - Trang 53-68 - 1966
K. V. Raman, M. L. Jackson
Micaceous clays (“illites”) of a number of sediments, subjected to quantitative mineral-ogical analysis, ranged in different samples from 58 to 65% of a dioctahedral mica of muscovite type, from 3 to 8% vermiculite, from 0 to 10% montmorillonite, from 2 to 12% quartz, from 0 to 4% feldspars, from 1 to 2% rutile and anatase, from 0.3 to 1.2% free iron oxides, and from 16 to 30% chlorite. The soil c...... hiện toàn bộ
Oxygen-Isotope Fractionation between Aluminum-Hydroxide Phases and Water at <60°C: Results of Decade-Long Synthesis Experiments
Cambridge University Press (CUP) - Tập 48 Số 2 - Trang 230-237 - 2000
Frédéric Vitali, Fred J. Longstaffe, Michael I. Bird, W. G. E. Caldwell
AbstractOxygen-isotope data were obtained for synthetic aluminum-hydroxide phases precipitated over 65–125 mo and have been compared to results from similar experiments conducted for 3–56 mo. The Al(OH)3 polymorphs, gibbsite, nordstrandite, and bayerite, were synthesized, but gibbsite was dominant in most samples, and commonly the only phase pr...... hiện toàn bộ
Effects of Acidification on the Chemical Composition and Layer Charge of Smectite from Calcareous Till
Cambridge University Press (CUP) - Tập 40 - Trang 731-739 - 1993
C. James Warren, Marvin J. Dudas, Salim A. Abboud
The objectives of the study were to determine the chemical composition and layer charge of smectite found in calcareous till of the Interior Plains region of western Canada and to examine the effects of acidification on alteration of the smectite. Samples of acidified and non-acidified (calcareous) late-Wisconsin till were obtained from four soil pits located immediately adjacent to an elemental s...... hiện toàn bộ
Morphology, Texture, and Microstructure of Halloysitic Soil Clays as Related to Weathering and Exchangeable Cation
Cambridge University Press (CUP) - Tập 40 - Trang 446-456 - 1992
B. Delvaux, D. Tessier, A. J. Herbillon, G. Burtin, Anne-Marie Jaunet, L. Vielvoye
This paper aims at characterizing the morphology, texture, and microstructure of three hydrated kaolin rich clays (f > 0.2 μm) from volcanic soils. These clays represent a weathering sequence in which CEC, halloysite content with respect to kaolinite, as well as smectite content in the halloysite-smectite mixed-layer clays decrease with increased weathering. The clay samples were made homoionic (K...... hiện toàn bộ
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