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