Free Content Order-disorder in clay mineral structures

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Abstract:

Some recent works dealing with the concept of order-disorder in clay minerals are considered, including those aspects of order-disorder which appeared in the Brindley & Brown (1980) monograph, i.e. disorder in the distribution of cations, disorder in layer stacking, order-disorder in mixed-layer systems and finite crystal size as a lattice disorder. Heterogeneity of samples and polymorphous transformations are also considered as other types of disorder. Most of these works emphasize that accurate structural characterization can only be obtained if several techniques are combined (e.g. XRD and IR, EXAFS and Mössbauer spectroscopies, etc.). Another conclusion is that accurate structural determination provides the key to the genesis of clays.

Keywords: CATION DISTRIBUTION; CLAY MINERALS; DISORDER; HETEROGENEITY; MIXED LAYER; ORDER; PHYLLOSILICATES

Document Type: Research Article

DOI: http://dx.doi.org/10.1180/000985501547286

Publication date: March 1, 2001

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