FAT CLAY

Miscellaneous

Notes

(Richard Willis)

A not-uncommon reference to bentonite because of its bloating when wetted; or to ball clays because of their particularly slippery and greasy-like texture when wet.
More normally, a clay-earth is “fat” when it is clay-rich, in the sense that an earth is referred to as “clay-rich” or “clay-poor”, and thereby fat or lean in clay content/proportion, which is to say its content/proportion of hydrous-layer alumina/alumino-silicate. Generally, the finer the grain size of a clay the “fatter” it is.

Authors

XML

<?xml version="1.0" encoding="UTF-8"?>
<material name="FAT CLAY" descrip="" generic="0" rawmineral="1" searchkey="" loi="0.00">
<families>
<family name="Clay Other"/>
</families>
<notes>
<note>A not-uncommon reference to bentonite because of its bloating when wetted; or to ball clays because of their particularly slippery and greasy-like texture when wet.&lt;BR&gt;
More normally, a clay-&lt;B&gt;&lt;I&gt;earth&lt;/I&gt;&lt;/B&gt; is &amp;#147;fat&amp;#148; when it is &lt;B&gt;&lt;I&gt;clay-rich&lt;/I&gt;&lt;/B&gt;, in the sense that an earth is referred to as &amp;#147;clay-rich&amp;#148; or &amp;#147;clay-poor&amp;#148;, and thereby fat or lean in clay content/proportion, which is to say its content/proportion of hydrous-layer alumina/alumino-silicate. Generally, the &lt;B&gt;finer&lt;/B&gt; the grain size of a clay the &lt;B&gt;&lt;I&gt;&amp;#147;fatter&amp;#148;&lt;/I&gt;&lt;/B&gt; it is.&lt;BR&gt;

</note>
</notes>
</material>


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