| Abstract: | The Warren-Averbach method, an X-ray diffraction (XRD) method used to measure mean particle thickness and particle-thickness distribution, is used to restudy sericite from the Silverton caldera. Apparent particle-thickness distributions indicate that the clays may have undergone Ostwald ripening and that this process has modified the K-Ar ages of the samples. The mechanism of Ostwald ripening can account for many of the features found for the hydrothermal alteration of illite. Expandabilities measured by the XRD peak-position method for illite/smectites (I/S) from various locations are smaller than expandabilities measured by transmission electron microscopy (TEM) and by the Warren-Averbach (W-A) method. This disparity is interpreted as being related to the presence of nonswelling basal surfaces that form the ends of stacks of illite particles (short-stack effect), stacks that, according to the theory of interparticle diffraction, diffract as coherent X-ray scattering domains. -from Authors |
| Genre: | Article |
| ProdID: | 70014300 |
| Citation Author: | Eberl, D. D.; Srodon, J. |
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| Citation End Page: | 1345 |
| Citation Issue: | 11-12 |
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| Citation Language: | English |
| Citation Larger Work Title: | American Mineralogist |
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| Citation Number Of Pages: | 11 |
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| Citation Search Results Text: | Ostwald ripening and interparticle-diffraction effects for illite crystals; 1988; Article; Journal; American Mineralogist; Eberl, D. D.; Srodon, J. |
| Citation Start Page: | 1335 |
| Citation Volume: | 73 |
| Citation Year: | 1988 |
| Type: | citation/reference |
| Text: | Ostwald ripening and interparticle-diffraction effects for illite crystals; 1988; Article; Journal; American Mineralogist; Eberl, D. D.; Srodon, J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1988 00:00 -0600 |
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