Synthèse des minéraux argileux.

Caillère, Simonne; Hénin, Stéphane; Esquevin, Jacques

doi:10.3406/argil.1957.940

Cited by 11 publications

(5 citation statements)

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“…In trioctahedral clay crystallogenesis literature, two models of nucleation and crystallization have been identified. − On the one hand, there is the model of the hydroxide sheet template . This model, first proposed by Caillère et al. , describes the earlier stage of trioctahedral smectite formation as a progressive condensation of silica onto an already settled hydroxide sheet. One decade ago, this formation mechanism was reported to explain hectorite formation. − More recently, Mg-saponite formation was revised by considering this formation mechanism .…”

Section: Resultsmentioning

confidence: 99%

“…33−41 On the one hand, there is the model of the hydroxide sheet template. This model, first proposed by Caillere et al 42,43 describes the earlier stage of trioctahedral smectite formation as a progressive condensation of silica onto an already settled hydroxide sheet. One decade ago, this formation mechanism was reported to explain hectorite formation.…”

Section: Crystal Growth and Designmentioning

confidence: 99%

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Local and Extended-Order Evolution of Synthetic Talc during Hydrothermal Synthesis: Extended X-ray Absorption Fine Structure, X-ray Diffraction, and Fourier Transform Infrared Spectroscopy Studies

Dumas

Mizrahi

Martin

et al. 2015

Crystal Growth & Design

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Synthetic talc is a new filler of industrial interest due to its submicron size, its chemical and mineral purity, and its hydrophilic character. To develop this filler on a preindustrial scale, this work aimed to understand the mechanisms of transformation from the amorphous talc precursor to crystalline synthetic talc. X-ray diffraction, Fourier transform infrared spectroscopy, and extended X-ray absorption fine structure at Ni–K edge techniques were used to study a Ni-talc series composed of a talc precursor sample and talc samples synthesized at 100, 200, and 300 °C for 1 or 6 h. As soon as the Ni-talc precursor precipitated, a tetrahedral–octahedral–tetrahedral-type structure appeared that was characterized by 2–3 Ni-octahedra distanced 3.07 Å from each other and by 3–4 Si tetrahedra distributed on the top and bottom of the octahedral “sheet” and distanced 3.29 Å from Ni. Simultaneously following the synthesis temperature, the octahedral sheet grew, and the tetrahedral sheet expanded; the distances Ni–Ni and Ni–Si also gradually shortened. The intracrystalline distribution of the octahedral sheet was also studied. At 300 °C, a random distribution was obtained. Cluster distribution was not observed at low temperature, which we hypothesize is a function of crystallite size.

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Section: Resultsmentioning

confidence: 99%

Section: Crystal Growth and Designmentioning

confidence: 99%

Local and Extended-Order Evolution of Synthetic Talc during Hydrothermal Synthesis: Extended X-ray Absorption Fine Structure, X-ray Diffraction, and Fourier Transform Infrared Spectroscopy Studies

Dumas

Mizrahi

Martin

et al. 2015

Crystal Growth & Design

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“…For epitaxial growth of trioctahedral clay, nucleation began via the formation of a hydroxide sheet on which silica was adsorbed (Manceau et al, 1999;Rainer et al, 2002;Schegel et al, 2001). This model, proposed by Caillère et al (1956Caillère et al ( , 1957 and often used since, was based on the similarity of structures of trioctahedral Mg, Ni, and Co hydroxides and the analogous octahedral sheet of trioctahedral clay minerals. The process was different for dioctahedral structures (Decarreau, 1983).…”

Section: Crystal Growth Of Smectitesmentioning

confidence: 99%

Study of Low-Pressure Argon Adsorption on Synthetic Nontronite: Implications for Smectite Crystal Growth

Decarreau

Petit

Andrieux

et al. 2014

Clays and clay miner.

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Because relatively little information about the crystal-growth process of smectite is available, the process was assessed here by studying the size and shape of nontronite particles synthesized at six different temperatures from 75 to 150ºC over a period of 4 weeks.The morphology of nontronites was studied using low-pressure isotherms of argon adsorption at 77 K, a method which enables the measurement of the basal and edge surface areas of the nontronite particles and of their mean diameter and thickness. During the crystal growth of nontronite, the mean particle length increased whereas their thickness (and the number of stacked layers) did not vary significantly.A specific two-dimensional crystal-growth process was observed for smectite via the lateral extension of the layers. This process also appears to occur during the growth of neoformed natural smectite.

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“…Washing (to remove amorphous materials) and drying at 110 to 258C completes the process. [23][24][25][26][27] Furthermore, the hydrothermal crystallization in the presence of fluoride anions provides a fast synthetic route for the preparation of MMT, 28 beidellite, saponite, 29 and clay-like organosilicates. 30 b The high temperature melt process, starts with fine powders of suitable salts (e.g.…”

Section: Synthetic Clays-methods Of Preparationmentioning

confidence: 99%

Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

Utracki

Sepehr

Boccaleri

2007

Polymers for Advanced Techs

382

252

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Synthetic, layered nano-particles for polymeric nanocomposites (PNC's)Utracki, L. A.; Sepehr, M.; Boccaleri, E.Contact us / Contactez nous: nparc.cisti@nrc-cnrc.gc.ca.http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=fr L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site Web page / page Web http://dx.doi.org/10.1002/pat.852 http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=15774991&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=15774991&lang=fr LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en This review discusses preparation and use of the synthetic layered nanoparticles in polymer matrices, i.e., in the polymeric nanocomposites (PNCs). Several types of synthetic or semi-synthetic layered materials are considered, namely the phyllosilicates (clays), silicic acid (magadiite), layered double hydroxides (LDHs), zirconium phosphates (ZrPs), and di-chalcogenides. The main advantage of synthetic clays is their chemical purity (e.g. absence of amorphous and gritty contaminants, as well as arsenic, iron, and other heavy metals), white to transparent color that assures reproducibly of brightly colored products, as well as a wide range of aspect ratios, p ¼ 20 to £6000. Several large scale production facilities have been established. The synthetic clay and LDH industries are oriented toward big volume markets: catalysis, foodstuff, cosmetics, pharmaceuticals, toiletry, etc. The use of these materials in PNCs is limited to synthetic clays and LDHs, mainly for reinforcement, permeability control, reduction of flammability, and stabilization, e.g. during dehydrohalogenation of chlorinated macromolecules. The use of lamellar ZrPs and di-chalcogenides is at the laboratory stage of functional polymeric systems development, e.g. for electrically conductive materials, catalysts or support for catalysts, in photochemistry, molecular and chiral recognition, or in fuel cell technologies, etc. Copyright # 2007 John Wiley & Sons, Ltd.KEYWORDS: polymeric nanocomposites; nanoparticles; clay; layered double hydroxides; matrix POLYMERS FOR ADVANCED TECHNOLOGIES Polym. Adv. Technol. 2007; 18: 1-37 Published online in Wiley InterScience (www.interscience.wiley.com) DOI: 10.1002/pat.852 AUTHORS' BIOGRAPHIESDr Leszek A. Utracki was born and educated (up to Habilitation) in Poland. After the post-doctoral stage at USC in Los Angeles with Robert Simha he settled in Canada. His passionate research interest has been within the field of thermodynamics, rheology and processing of multicomponent, multiphase polymeric systems. During the 55 years in the profession he has published several hundred articles, book chapters, books, patents, etc., which has placed him on the ISI li...

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Synthèse des minéraux argileux.

Cited by 11 publications

References 0 publications

Local and Extended-Order Evolution of Synthetic Talc during Hydrothermal Synthesis: Extended X-ray Absorption Fine Structure, X-ray Diffraction, and Fourier Transform Infrared Spectroscopy Studies

Local and Extended-Order Evolution of Synthetic Talc during Hydrothermal Synthesis: Extended X-ray Absorption Fine Structure, X-ray Diffraction, and Fourier Transform Infrared Spectroscopy Studies

Study of Low-Pressure Argon Adsorption on Synthetic Nontronite: Implications for Smectite Crystal Growth

Synthetic, layered nanoparticles for polymeric nanocomposites (PNCs)

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