Morphology of Kaolinite Weathered from a Non-Feldspathic Mica-Phyllite

W. D. Keller, M. Reichelt* and J. Neužil*
University of Missouri Columbia, MO 65211, USA
* Charles University, Praha 2, Czechoslovakia

Abstract: The morphology and fabric of kaolin weathered from a non-feldspathic mica-phyllite in Znojmo, Moravia, are illustrated in scanning electron micrographs. In contrast to accordion-like kaolinite books, or elongate halloysite(?) crystals, commonly developed from feldspar, the kaolinite from the mica-phyllite tends to be individually platy, with highly irregular edges resulting from multiple adjacent crystal comers and re-entrants. Irregular or impaired crystal growth of kaolinite from mica may be due to ‘poisoning’ of kaolinite crystals by vanadium that is common in mica.

Clay Minerals; September 1981 v. 16; no. 3; p. 289-295; DOI: 10.1180/claymin.1981.016.3.06
© 1981, The Mineralogical Society
Mineralogical Society (www.minersoc.org)