Scanning Electron Microscopic Study of Imogolite Formation from Plagioclase

Kazue Tazaki
Institute for Thermal Spring Research, Okayama University Misasa, Tottori-ken, 682-02, Japan

Abstract: Imogolite occurs as tiny bumps less than 0.05 µm in diameter and about 0.3 µm long on amorphous thin layers on the surface of weathered plagioclase. The bumps grow outward from the surface to form projections, which then develop into a fibrous imogolite. The fibers branch out and grow into widespread networks or thin films which finally cover the entire surface of the plagioclase grain. The fibers are about 0.05 µm in diameter as seen by transmission electron microscopy.

Key Words: Alteration • Fiber • Imogolite • Plagioclase • SEM • Weathering

Clays and Clay Minerals; June 1979 v. 27; no. 3; p. 209-212; DOI: 10.1346/CCMN.1979.0270306
© 1979, The Clay Minerals Society
Clay Minerals Society (www.clays.org)