Abstract
Factors intervening in evaluating various microstructural characteristics of clay minerals by X-ray microprobe technique, are elucidated. Three vermiculite minerals of different origin have been studied by both wave-length and energy-dispersive X-ray microprobes following the novel pretreatment and analytical procedures. X-ray images, presented here for vermiculites, heat treated at lower temperatures, indicate homogeneity in elemental distribution. On the other hand, samples which are treated at higher temperatures, show heterogeneity in elemental distribution. Variations in elemental distribution with rise in temperature have been explained in terms of the changes occurring in the structure of the mineral. It is shown here that X-ray microprobe technique is very effective in determination of trace elements in clay mineral.
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