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Changes in particle morphology during illitization: an experimental study

Clays and Clay Minerals

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Abstract

Smectite was reacted at several temperatures between 200??C and 500??C to produce interstratified illite/smectite (I/S) with different proportions of expandable layers. Dispersed and sedimented products were examined using a transmission electron microscope. Particle size and aspect ratio showed no systematic change as a function of reaction extent during RO illitization. However, particles exhibited rounded edges during the early stages of the reaction, suggesting some dissolution of primary smectite. The thickening of particles is thought to be produced by the nucleation and precipitation of secondary illite layers on primary smectite layers. In the most extensively reacted I/S, particles have become aggregated into clumps or quasicrystals by lateral growth of illite layers. In highly illitic I/S, these aggregates took on an overall euhedral form and became crystallographically contiguous, producing single crystal electron diffraction patterns. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Changes in particle morphology during illitization: an experimental study
Series title:
Clays and Clay Minerals
Volume
41
Issue:
2
Year Published:
1993
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Clays and Clay Minerals
First page:
209
Last page:
218
Number of Pages:
10