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Mixed-layer kerolite/stevensite from the Amargosa Desert, Nevada

Clays and Clay Minerals

By:
, , and
https://doi.org/10.1346/CCMN.1982.0300501

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Abstract

Mixed-layer clays composed of randomly interstratified kerolite/stevensite occur as lake and/or spring deposits of probable Pliocene and Pleistocene age in the Amargosa Desert of southern Nevada, U.S.A. The percentage of expandable layers of these clays, determined from computer-simulated X-ray diffractograms, ranges from almost 0 to about 80%. This range in expandabilities most likely results from differences in solution chemistry and/or temperature at the time of formation. An average structural formula for the purest clay (sample P-7), a clay with about 70% expandable layers, is:

[(Mg2.72Al0.07Fe0.03Li0.09)(Si3.96Al0.04)O10(OH)0.2]-0.21[X+0.21]+0.21

The data suggest that talc, kerolite, and stevensite form a continuous structural series based on layer charge.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Mixed-layer kerolite/stevensite from the Amargosa Desert, Nevada
Series title:
Clays and Clay Minerals
DOI:
10.1346/CCMN.1982.0300501
Volume:
30
Issue:
5
Year Published:
1982
Language:
English
Publisher:
The Clay Minerals Society
Description:
6 p.
First page:
321
Last page:
326