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Structural transformations of kaolins into (Ni, Al) serpentine-like phases and subsequently into trioctahedral micas under hydrothermal conditions

Published online by Cambridge University Press:  09 July 2018

V. A. Frank-Kamenetskii
Affiliation:
Department of Crystallography, Leningrad State University, University Embankment 7/9, Leningrad V-034 USSR 199034
E. A. Goilo
Affiliation:
Department of Crystallography, Leningrad State University, University Embankment 7/9, Leningrad V-034 USSR 199034
N. V. Kotov
Affiliation:
Department of Crystallography, Leningrad State University, University Embankment 7/9, Leningrad V-034 USSR 199034
M. Rieder
Affiliation:
Institute of Geological Sciences, Charles University, Albertov 6, 12843 Praha 2, Czechoslovakia

Extract

It has been shown that clay minerals transform into (Mg, Al) or (Ni,Al) serpentine-like phases if treated hydrothermally in the presence of MgCO3 or NiCO3 (Shitov et al., 1974, Frank-Kamenetskii et al., 1978, 1983a,b; Kotel'nikova et al., 1976; Varela et al., 1983; Kotov et al., 1985; Ryumin et al., 1978) and that the polytypism of the initial kaolins is inherited by the products. It has also been shown that (Mg,Al) serpentine-like phases react with KC1 to form dioctahedral micas and Mg-rich serpentine phases, but the latter do not react to trioctahedral micas (Kotel'nikova et al., 1976). Consequently, it was desirable to look for mechanisms for obtaining trioctahedral micas from serpentine-like phases.

Type
Note
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1990

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