Ferric iron in upper mantle Cr-spinels: a Mossbauer spectroscopic study

S. Nasir, A. F. Lahlooh, S. Mahmood, I. A. Al-Jarayesh

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Abstract

Mossbauer spectra for 14 Cr-bearing spinels, separated from spinel lherzolite xenoliths, were measured to study their Fe2+-Fe3+ crystallographic ordering. Spectra acquired at 298 and 77 K suggest that both Fe2+ and Fe3+ are tetrahedrally coordinated in lherzolite Cr-bearing spinels with low Fe3+/Fetot ratios. The investigated Cr-spinels show similar hyperfine parameters, quadrupole splittings and isomer shifts to Mossbauer studies of upper mantle Cr-spinels from lherzolite xenoliths as reported elsewhere, suggesting the similarity in Fe2+ and Fe3+ ordering. -from Authors

Original languageEnglish
Pages (from-to)369-375
Number of pages7
JournalChemie der Erde - Geochemistry
Volume53
Issue number4
Publication statusPublished - 1993

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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    Nasir, S., Lahlooh, A. F., Mahmood, S., & Al-Jarayesh, I. A. (1993). Ferric iron in upper mantle Cr-spinels: a Mossbauer spectroscopic study. Chemie der Erde - Geochemistry, 53(4), 369-375.