The location and content of iron in natural biotites and phlogopites: a comparison of several methods

1 March 1978

journal article
Published by Mineralogical Society in Clay Minerals

Vol. 13 (1) , 45-52
https://doi.org/10.1180/claymin.1978.013.1.04

Abstract

Mössbauer spectra have been obtained at room temperature on a series of phlogopites and biotites which have also been characterized by chemical analyses, I.R. and N.M.R. The distribution of the Fe²⁺ ions on the two possible octahedral sites is on the average nearly random. A clear example of tetrahedrally coordinated Fe³⁺ ions in a natural phlogopite is given. This phlogopite has a very high vermiculitization ability. The Fe³⁺ content of the samples has been determined by two different chemical methods and it is shown that even when precautions are taken to minimize oxidation, the agreement with Mössbauer spectra is poor.

Keywords

This publication has 3 references indexed in Scilit:

NMR study of micas. I. Distribution of Fe2+ ions on the octahedral sites
The Journal of Chemical Physics, 1977
A study of the weathering of a biotite using the Mössbauer effect
Mineralogical Magazine, 1973
The Vermiculitization of Trioctahedral Micas
Clay Minerals, 1973