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Expert System for Structural Characterization of Phyllosilicates: II. Application to Mixed-Layer Minerals

Published online by Cambridge University Press:  09 July 2018

V. A. Drits  and
A. Plançon
V. A. Drits
Affiliation:
Geological Institute, Academy of Sciences, 10917 Moscow, Russia
A. Plançon
Affiliation:
Physics Department, Orléans University, 45100 Orléans-la-Source, France
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Abstract

The expert system described in the first part of this paper has been applied to the identification of mixed-layer phyllosilicates (mica-smectite, mica-vermiculite, chlorite-smectite, chlorite-vermiculite, chlorite-swelling chlorite, chlorite-mica, chlorite-talc, kaolinite-smectite, talc-smectite), and to the determination of their structural parameters (Reichweite, R, and proportions of constituting layers, Wi). The expert system has been run utilizing the data extracted from (1) experimental XRD patterns for which structural parameters had been evaluated by comparison with calculated patterns, or (2) patterns calculated using pre-selected values of the structural parameters. In all cases examined, the expert system provided correct conclusions concerning the identification of a mixed-layer phyllosilicate and the value of the Reichweite, while the abundances of the component layers were evaluated with a margin of error usually <5%.

Type
Research Article
Information
Clay Minerals , Volume 29 , Issue 1 , March 1994 , pp. 39 - 45
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1994

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