Synthetic Kaolinites Doped with Fe2+ and Fe3+ Ions
Open Access
- 1 January 1977
- journal article
- Published by Springer Nature in Clays and Clay Minerals
- Vol. 25 (6) , 381-383
- https://doi.org/10.1346/ccmn.1977.0250602
Abstract
Previous studies by Electron Spin Resonance (ESR) have established the substitution of Fe 3+ and Mg 2+ in the kaolinite structure. It is shown that Fe E+ can substitute in kaolinite and stabilize defects which are detectable by ESR in a manner identical to Mg 2+. The development of methods of preparing a synthetic kaolinite doped with Fe 2+ is described in detail. It is shown that the main ESR signals, which occur at g = 2.0 in natural kaolinites and which previously have been interpreted in terms of iron and magnesium, can be attributed to iron alone.Keywords
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