Ostwald ripening and interparticle-diffraction effects for illite crystals
American Mineralogist
By: D. D. Eberl and J. Srodon
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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
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Ostwald ripening and interparticle-diffraction effects for illite crystals |
| Series title | American Mineralogist |
| Volume | 73 |
| Issue | 11-12 |
| Year Published | 1988 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | American Mineralogist |
| First page | 1335 |
| Last page | 1345 |
| Google Analytic Metrics | Metrics page |