Original paper

A Mössbauer study of natural gahnite spinels showing strongly temperature-dependent quadrupole splitting distributions

Waerenborgh, João C.; Annersten, Hans; Ericsson, Tore; Figueiredo, Maria O.; Cabral, Juan M.P.

European Journal of Mineralogy Volume 2 Number 3 (1990), p. 267 - 272

12 references

published: Jun 21, 1990
manuscript accepted: Mar 5, 1990
manuscript received: Nov 7, 1988

DOI: 10.1127/ejm/2/3/0267

BibTeX file

ArtNo. ESP147050203012, Price: 29.00 €

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Abstract Natural iron-containing gahnite spinels (ZnAl2O4) are investigated using MÖssbauer spectroscopy. Ferrous and ferric iron are completely ordered into tetrahedral and octahedral sites, respectively. Spectra recorded at 295, 77 and U K show a dramatic change in the absorption envelope ; this effect is ascribed to an inhomogeneous electric field gradient caused by near-neighbour effects acting on the ferrous iron in tetrahedral sites. The magnitude of this effect is shown to increase with increasing Fe2+ substitution.


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