The Nature of Garnierites—II Electron-Optical Study

Natsu Uyeda, Pham Thi Hang and G. W. Brindley
Institute for Chemical Research, Kyoto University, Kyoto, Japan
Department of Geosciences, and Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania, 16802, U.S.A.

Abstract: Electron micrographs of 7 Å-type and 10 Å-type garnierites have been recorded at 5·104–105X magnifications to show the morphological character of these minerals, and at 106X magnification to show structural features of the particles. The 7 Å, serpentine-like minerals show a greater variety of morphological forms including tube- and rod-shaped particles and also platy forms and poorly defined, fluffy particles, probably aggregates. The 10 Å, talc-like minerals show mainly platy forms and fluffy aggregates, and generally very few tube or rod-shaped particles. At 106X magnifications, the 7 and 10 Å layer spacings are seen directly. In the samples examined, the 7 Å spacings are more clearly and more regularly defined than the 10 Å spacings.

Clays and Clay Minerals; February 1973 v. 21; no. 1; p. 41-50; DOI: 10.1346/CCMN.1973.0210107
© 1973, The Clay Minerals Society
Clay Minerals Society (www.clays.org)