Results 171 to 180 of about 2,180 (204)

Charge location effect on the hydration properties of synthetic saponite and hectorite saturated by Na+, Ca2+ cations: XRD investigation

Applied Clay Science, 2009
International audienceThis paper aims at comparing the effect of charge location on the hydration properties of two trioctahedral synthetic minerals: saponite and hectorite.
Bruno Lanson, A Ben Haj Amara, H Ben Rhaiem   +2 more
exaly   +2 more sources

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Swelling and Structural Organization of Saponite

Clays and Clay Minerals, 1975
AbstractThe structural formula of Kozfikov saponite (Czechoslovakia) is as follows: $N{a_{0.005}}C{a_{0.22}}{K_{0.01}}[S{i_{3.30}}A{l_{0.68}}F{e^{3 + }}{}_{0.02}][M{g_{2.50}}F{e^{2 + }}{}_{0.26}F{e^{3 + }}{}_{0.24}]{O_{10}}{(OH)_2}.$ Saturated with 6 different cations (Li, Na, K, Ca, Mg, Ba) its swelling in ethylene glycol, glycerol and water and its ...
H. Suquet, C. de la Calle, H. Pezerat
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A mineral ionic conductor - saponite

Solid State Ionics, 1991
Abstract Electrical properties of saponite were measured. It was found that the saponite had relatively high ionic conductivity. The conductivity at room temperature amounted to 3.2 × 10 −3 S cm .
Z LIN, S TIAN, H YU, M DENG, Z MA, R XU
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Optimization of the Pillaring of a Saponite

1992
AI-pillared clays thermally stable up to 750°C have been prepared from easily available starting materials: a natural clay, namely the saponite, and a commercial aqueous solution of Chlorhydrol.
S. Chevalier, H. Suquet, R. Franck, C. Marcilly, D. Barthomeuf   +4 more
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Silylation of saponite with 3-aminopropyltriethoxysilane

Applied Clay Science, 2016
Abstract A series of saponites (Sap) with a fixed Si/Mg ratio and varied Al contents were synthesized by using hydrothermal methods. The spectral, structural and morphology characters of the obtained products were characterized by a combination of XRD, FTIR, TG-DTG, TEM, 29 Si MAS NMR, 13 C NMR etc .
Qi Tao, Yan Fang, Tian Li, Dan Zhang, Manyou Chen, Shichao Ji, Hongping He, Sridhar Komarneni, Huaibin Zhang, Yan Dong, Young Dong Noh   +10 more
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Dehydration and Rehydration of Saponite and Vermiculite

Clays and Clay Minerals, 1991
AbstractThe rehydration properties and behavior of interlayer cations of Ca-, Mg-, Na-, and K-saturated homoionic saponite and vermiculite heated at various temperatures were examined and their rehydration mechanisms elucidated. The most notable features of saponite were (1) except for the Mg-saturated specimen, all saponite samples rehydrated until ...
Motoharu Kawano, Katsutoshi Tomita
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Analyses of a Variety of Saponite

Mineralogical Magazine and Journal of the Mineralogical Society, 1883
The variety of saponite described in the following note was first obtained by Mr. Waiter Burns, of the Geological Society of Glasgow, from a quarry in the Cathkin Hills, about three miles S.S.E. of Glasgow, The quarry is hewn out of dark-coloured dolerite, rich in olivine, which restg on beds of felspathic ash. The dolerite has in places been converted
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Sorption of hydrochloric acid with saponite

Journal of Water Chemistry and Technology, 2013
We have investigated sorption of hydrochloric acid with saponite of the Varvarovskii deposit, Khmelnitsky region (Ukraine) against various salt backgrounds in the solution, varied by an addition of sodium chloride. Information has been obtained on desorption of cations of Na+, K+, Ca2+, Mg2+, Fen+, Al3+ from saponite at different acidity of the ...
Yu. A. Dmitrenko, A. V. Mamchenko
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Structural studies of pillared saponite

The Journal of Physical Chemistry, 1993
The layered aluminosilicate saponite has been pillared with [Al 13 O 4 (OH) 24 (H 2 O) 12 ] 7+ (referred to as Al 13 ) and with the organosilicon compound NH 2 (CH 2 ) 3 Si(OC 2 H 5 ) 3 (referred to as Si-R) and studied using XRD, FTIR, 29 Si and 27 Al MAS NMR, and gas adsorption. In the case of Si-R the average length of the Si-O-Si chain is seven
Liansheng Li, Xinsheng Liu, Ying Ge, Ruren Xu, Joao Rocha, Jacek Klinowski   +5 more
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Pillaring of saponite with zirconium oligomers

Microporous and Mesoporous Materials, 1998
Abstract The intercalation of two saponites and a montmorillonite with various zirconium oligomers, prepared from the hydrolysis of zirconyl chloride or zirconium acetate, has been studied. The structure of the intercalated clays strongly depended on the method of preparation and on the nature and crystallinity of the clays studied.
Ricardo Toranzo, Miguel Angel Vicente, Miguel Angel Bañares-Muñoz, Luis M Gandı́a, Andoni Gil   +4 more
openaire   +1 more source