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Growth Conditions and Genesis of Spherical and Platy Kaolinite

Published online by Cambridge University Press:  02 April 2024

Shinji Tomura ,
Yasuo Shibasaki ,
Hiroyuki Mizuta  and
Masao Kitamura
Shinji Tomura
Affiliation:
Government Industrial Research Institute, Nagoya, 1 Hirate-cho, Kita-ku, Nagoya 462, Japan
Yasuo Shibasaki
Affiliation:
Government Industrial Research Institute, Nagoya, 1 Hirate-cho, Kita-ku, Nagoya 462, Japan
Hiroyuki Mizuta
Affiliation:
Government Industrial Research Institute, Nagoya, 1 Hirate-cho, Kita-ku, Nagoya 462, Japan
Masao Kitamura
Affiliation:
Department of Geology and Mineralogy, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606, Japan
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Abstract

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Spherical and platy kaolinite crystals were prepared under several hydrothermal conditions. Spherical kaolinite was produced mainly at high solid/water ratio (1/4) and at low temperatures (150°-200°C). Platy kaolinite predominated in products from experiments with intermediate solid/water ratios (1/256-1/16) and at high temperatures. Boehmite predominated at low solid/water ratios (1/4096) at all experimental temperatures (180°-220°C). The results indicate that the growth of the spherical kaolinite was favored at high degrees of supersaturation, whereas the growth of the platy kaolinite was favored at relatively low degrees of supersaturation.

Keywords

Crystal growthKaoliniteMorphologyPlatesSpherulesSynthesis
Type
Research Article
Information
Clays and Clay Minerals , Volume 33 , Issue 3 , June 1985 , pp. 200 - 206
Copyright
Copyright © 1985, The Clay Minerals Society

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