高岭石-英文1.pdf

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Clays and Clay Minerals, Vol. 43, No. 4, 482--494, 1995.
HYDROTHERMAL SYNTHESIS (250"C) OF
COPPER-SUBSTITUTED KAOLINITES
SABINE PETIT, 1 ALA/N DECARREAU, 1 CHRISTINE MOSSER, 2
GABRIELLE EHRET, 3 AND OLIVIER GRAtmY 4
"Argiles, Sols & At6rations", URA CNRS 721
Universit6 de Poitiers, 40 Avenue du Recteur Pineau
F-86022 Poitiers Cedex, France
2 Centre de G6ochimie de la surface, UPR CNRS 6251
t rue Blessig, 67084 Strasbourg Cedex, France
3 IPCMS, CNRS, 23, rue du loess, F-67037 Strasbourg Cedex, France
4 Centre de Recherche sur les M6canismes de la Croissance Cristalline
UPR CNRS 7251, Campus de Luminy, Case 913, F-13288 MarseiUe, France
Abstract--To obtain Cu-kaolinites with a controlled range of chemical compositions, syntheses were
performed by hydrothermally ageing gels with kaolinite stoichiometric compositions. Gels were prepared
with sodium metasilicate and nitrates of oetahedral cations. Temperature of synthesis was 250"C with a
corresponding equilibrium water pressure of 38 bars.
Three samples with copper contents ranging from 0.1 to 7% and another one with the chemical
composition of the Cu end-member were synthesized. While this fourth sample led to tenorite after the
hydrotherma