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Electron-microscopic and Mössbauer Spectroscopic Studies of Iron-Stained Kaolinite Minerals
Clays and clay minerals
An electron-microscopic and MiSssbauer spectroscopic study of a range of kaolinites has revealed three distinct types of iron contamination within these minerals: a) Ferric ion may substitute for aluminium and be evenly distributed throughout the lattice, b) Ferric ion may be present as a crystalline coating of goethite, as indicated by lattice-imaging studies, or c) as an amorphous coating. The distribution of the iron in the groups b and c is non-uniform and is highest at the flake surfaces.doi:10.1346/ccmn.1975.0230505 fatcat:kumvia2hrzhhljpfovl7ggmioe