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Micaceous occlusions in kaolinite observed by ultramicrotomy and high resolution electron microscopy

Abstract

The layer structure of kaolinite from Twiggs, Georgia, and fire-clay type kaolinite (Frantex B, from France, particle size separates 2 0.2 ..mu..m was studied by high resolution electron microscopy after embedment in Spurr low-viscosity Epoxy media and thin sectioning normal to the (001) planes by an ultramicrotome. Images of the (001) planes (viewed edge-on) of both kaolinites were spaced at 7 A and generally aligned in parallel, with occasional bending into more widely spaced images of about 10 A interval. Some of the 10 A images converged to 7 A at one or both ends, forming ellipse-shaped islands 80 to 130 A thick and 300 to 500 A long. The island areas and interleaved 10 A layers between 7 A layers may represent a residue of incomplete weathering of mica to kaolinite. The proportions of micaceous occlusions were too small and the layer sequences too irregular to be detected by X-ray diffraction. The lateral continuity of the layers through the 7-10-7 A sequence in a kaolinite particle would partially interrupt or prevent expansion in dimethyl sulfoxide (DMSO) and other kaolinite intercalating media. Discrete mica particles were also observed with parallel images at 10 A, as impurities in both kaolinites. The  More>>
Authors:
Lee, S Y; [1]  Jackson, M L; Brown, J L
  1. Univ. of Wisconsin, Madison
Publication Date:
Jan 01, 1975
Product Type:
Journal Article
Reference Number:
ERA-02-036381; EDB-77-083873
Resource Relation:
Journal Name: Clays Clay Miner.; (United Kingdom); Journal Volume: 23
Subject:
58 GEOSCIENCES; KAOLINITE; ELECTRON MICROSCOPY; GEOCHEMISTRY; MICA; DMSO; PARTICLE SIZE; WEATHERING; X-RAY DIFFRACTION; ALUMINIUM COMPOUNDS; ALUMINIUM SILICATES; CHEMISTRY; COHERENT SCATTERING; DIFFRACTION; MICROSCOPY; MINERALS; ORGANIC COMPOUNDS; ORGANIC SULFUR COMPOUNDS; OXYGEN COMPOUNDS; SCATTERING; SILICATES; SILICON COMPOUNDS; SIZE; SULFOXIDES; 580300* - Mineralogy, Petrology, & Rock Mechanics- (-1989)
OSTI ID:
7116014
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: CLCMA
Submitting Site:
TIC
Size:
Pages: 125-129
Announcement Date:
Jun 01, 1977

Citation Formats

Lee, S Y, Jackson, M L, and Brown, J L. Micaceous occlusions in kaolinite observed by ultramicrotomy and high resolution electron microscopy. United Kingdom: N. p., 1975. Web. doi:10.1346/CCMN.1975.0230208.
Lee, S Y, Jackson, M L, & Brown, J L. Micaceous occlusions in kaolinite observed by ultramicrotomy and high resolution electron microscopy. United Kingdom. doi:10.1346/CCMN.1975.0230208.
Lee, S Y, Jackson, M L, and Brown, J L. 1975. "Micaceous occlusions in kaolinite observed by ultramicrotomy and high resolution electron microscopy." United Kingdom. doi:10.1346/CCMN.1975.0230208. https://www.osti.gov/servlets/purl/10.1346/CCMN.1975.0230208.
@misc{etde_7116014,
title = {Micaceous occlusions in kaolinite observed by ultramicrotomy and high resolution electron microscopy}
author = {Lee, S Y, Jackson, M L, and Brown, J L}
abstractNote = {The layer structure of kaolinite from Twiggs, Georgia, and fire-clay type kaolinite (Frantex B, from France, particle size separates 2 0.2 ..mu..m was studied by high resolution electron microscopy after embedment in Spurr low-viscosity Epoxy media and thin sectioning normal to the (001) planes by an ultramicrotome. Images of the (001) planes (viewed edge-on) of both kaolinites were spaced at 7 A and generally aligned in parallel, with occasional bending into more widely spaced images of about 10 A interval. Some of the 10 A images converged to 7 A at one or both ends, forming ellipse-shaped islands 80 to 130 A thick and 300 to 500 A long. The island areas and interleaved 10 A layers between 7 A layers may represent a residue of incomplete weathering of mica to kaolinite. The proportions of micaceous occlusions were too small and the layer sequences too irregular to be detected by X-ray diffraction. The lateral continuity of the layers through the 7-10-7 A sequence in a kaolinite particle would partially interrupt or prevent expansion in dimethyl sulfoxide (DMSO) and other kaolinite intercalating media. Discrete mica particles were also observed with parallel images at 10 A, as impurities in both kaolinites. The small K content of the chemical analyses of the kaolinite samples is accounted for as interlayer K, not only in discrete mica particles but also in the micaceous occlusions.}
doi = {10.1346/CCMN.1975.0230208}
journal = {Clays Clay Miner.; (United Kingdom)}
volume = {23}
journal type = {AC}
place = {United Kingdom}
year = {1975}
month = {Jan}
}