A method for preventing the rehydration of heated smectites during X‐ray diffraction analysis
- 11 November 1988
- journal article
- research article
- Published by Taylor & Francis in Communications in Soil Science and Plant Analysis
- Vol. 19 (15) , 1667-1680
- https://doi.org/10.1080/00103628809368044
Abstract
Heating samples of clays to various temperatures is a common pretreatment for identification of clay minerals by X‐ray diffraction (XRD). The exchangeable cations in the interlayer region of smectitic clays can rehydrate when the sample is cooled after the heat treatments. Because the basal spacings (d(001)) of smectites are a function of the hydration state of the interlayer cations, they can be easily misinterpreted if the hydration state is not controlled during the XRD analysis. In this report a method for preventing the rehydration of interlayer cations during XRD analysis is described, and its effectiveness is demonstrated on selected samples of clays.Keywords
This publication has 1 reference indexed in Scilit:
- The Effect of Atomic Weight of the Saturating Ion on the (001) X‐Ray Diffraction Peaks of Layer SilicatesSoil Science Society of America Journal, 1961