Clays and Clay Minerals, Vol. 54, No. 1, 80-86, 2006.
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Authors
Ryu, Kyoung-Won
Jang, Young-Nam
Chae, Soo-Chun
Bae, In-Kook
Choi, Sang-Hoon
Issue Date
2006
Type
Article
Language
en_US
Keywords
Periodicals , Geology , Beidellite , Greene-Kelly Test , Hydrothermal Synthesis , Smectite
Alternative Title
Hydrothermal Synthesis of Smectite from Dickite
Abstract
Dioctahedral smectite was prepared hydrothermally from dickite [Al2Si2O5(OH)4] as a starting material by autoclaving in a closed stainless steel vessel with variable temperature, pressure, time and pH conditions. Highly crystalline smectite can be obtained at 290ëC under a pressure of 69 bar for 48 h. The pH of the solution was an important factor and should be maintained at 10 to 11 for the successful formation of smectite. Characterization by X-ray powder diffraction, scanning electron microscopy, infrared spectroscopy, thermogravimetric analysis, differential thermal analysis and the Greene-Kelly test showed that the smectite synthesized was Na-beidellite, mostly because of the heat treatment of the starting material and the stoichiometric batch composition.
Description
gsccm-54-1-10-ryu.pdf 840KB PDF/A.
Citation
Clays and Clay Minerals, Vol. 54, No. 1, 80-86, 2006.
Publisher
The Clay Minerals Society
License
Copyright © 2006-2018, The Clay Minerals Society