Results 121 to 130 of about 596 (160)

Microwave-assisted synthesis of saponite

Applied Clay Science, 2010
Saponites have been successfully synthesized by using the microwave hydrothermal method at 393 K for 6 h. Al(IV)(Td)/Al(VI)(Oh) ratio and CEC values of the microwaved samples were higher than those obtained for the saponites prepared by conventional hydrothermal method at the same temperature for 72 h. Characteristics of the saponites synthesized under
Isabel Vicente, Pilar Salagre, Yolanda Cesteros, Francisco Medina, Jesús E. Sueiras   +4 more
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Study on structural changes of saponite and a saponite/acriflavine complex by heating

Applied Clay Science, 1989
Abstract Block samples of saponite and a saponite/acriflavine complex were heated at temperatures up to 1400°C in a nitrogen atmosphere. Structural changes caused by heating were examined. While the major crystalline phase of the complex showed fine enstatite crystals at temperatures up to 1400°C, the one of the saponite showed a change from ...
Asao Ōya, Sugio Ōtani
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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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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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Saponite, Corrensite and Chlorite-Saponite Mixed-Layers in the Sancerre-Couy Deep Drill-Hole (France)

Clay Minerals, 1994
AbstractThe clay deposits in fractures of the metamorphic basement under the Paris Basin sedimentary formations at Sancerre-Couy (France) are composed of trioctahedral species which are exceptionally well crystallized. Three samples were chosen in order to study the chemical composition of 100% expandable saponite, 50% expandable corrensite and 10 ...
D. Beaufort, A. Meunier
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Saponite from the Emet Colemanite Mines, Kütahya, Turkey

Clays and Clay Minerals, 2000
AbstractClay mineralogy and whole-rock chemistry of the borate-bearing layers of the Hisarcik and Esbey mines were examined. The Hisarcik clays occur as laminated or unlaminated clay layers with sharp contacts. Unlaminated layers contain quartz derived from metamorphic rocks and carbonate fragments in a clay matrix, and are interpreted as reworked ...
Maggetti, M, Çolak, Mümtaz, Helvaci, C
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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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Hydrothermal Reactivity of Saponite

Clays and Clay Minerals, 1983
AbstractSaponite crystallizes from amorphous gel having an ideal saponite composition within 7 days at all experimental temperatures between 300° and 550°C at 1 kbar pressure. Reactions subsequent to this initial crystallization vary in type and degree, depending on the temperature of reaction and the type of interlayer cation.
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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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