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Mössbauer spectroscopy of minerals

✍ Scribed by D. G. Rancourt

Publisher: Springer-Verlag
Year: 1994
Tongue: English
Weight: 679 KB
Volume: 21
Category: Article
ISSN: 0342-1791
DOI: 10.1007/bf00202139

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✦ Synopsis

We demonstrate by trade-off and error analysis of representative spectra that paramagnetic state M6ssbauer spectroscopy of 2:1 layer silicates cannot resolve the octahedral Fe 2+ cis (M2) and trans (M1) sites. We show that it is impossible to extract cis/trans population ratios from two Fe 2+ doublet analyses of the spectra and that, instead, one has a single continuous Fe 2+ quadrupole splitting distribution (QSD) that cannot reliably or uniquely be partitioned into its constituents. Whereas extracted cis/trans ratios do not contribute to evaluating site occupancies, the QSDs themselves in principle contain much local structural and chemical information that should be the focus of futur work.

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