CLAVERIE, Marie; MARTIN, François; CARÊME, Christel; LE ROUX, Christophe; MICOUD, Pierre; GRAUBY, O.; AYMONIER, Cyril

doi:10.1180/clm.2018.36

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CLAVERIE, Marie
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Imerys Aluminates

MARTIN, François
Géosciences Environnement Toulouse [GET]

CARÊME, Christel
Imerys Aluminates

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Clay Minerals. 2018-09, vol. 53, n° 3, p. 497-503

Mineralogical Society

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This work presents the synthesis of minerals with a layered structure in supercritical water/ethanol mixtures to decrease the critical coordinates of the solvent regarding water. Depending on the water/ethanol ratio of the solvent, we obtained three different minerals adopting an octahedral brucitic sheet: (1) without a Si-tetrahedral sheet (O); (2) associated with one Si-tetrahedral sheet (T-O); or (3) intercalated between two Si-tetrahedral sheets (T-O-T). We have thus shown that ethanol in a supercritical water/ethanol mixture changes the solubility of silicon with a direct consequence on the formation of the tetrahedral silicon sheets and thus makes it possible to control the structure of the synthesized layered material.< Leer menos

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Flow supercritical synthesis of brucite and magnesian T-O, T-O-T phyllosilicates : an opportunity to tune the structure with the solvent composition

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