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Mössbauer Spectrum of Synthetic Ferri-diopside

Nature Physical Science volume 233, pages 9–11 (1971)Cite this article

Abstract

RATIOS of ferric to ferrous iron in natural pyroxenes reflect the oxygen fugacity of the environment during crystallization. This ratio can be determined with precision using Mössbauer spectroscopy. Natural pyroxenes with compositions within the diopside-enstatite-ferrosilite-hedenbergite quadrilateral generally have values of Fe3+/(Fe2+ + Fe3+) which range from 0.01 to ∼0.2. Members of the augite solid solution series, however, may exhibit much larger ratios which average about 0.5 but may reach 0.94 in extreme cases1. The large Fe3+ content of augites may be attributed to a hypothetical ferri-Tschermak's molecule CaFe3+ SiO6 in which MgSi of diopside is replaced by two Fe32 ions2,3.

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Authors and Affiliations

  1. Department of the Geophysical Sciences, University of Chicago, Chicago, Illinois, 60637

    S. S. HAFNER

  2. Mineralogisch-petrographisches Institut, der Universität München, 8000, München, 2

    H. G. HUCKENHOLZ

Authors
  1. S. S. HAFNER
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  2. H. G. HUCKENHOLZ
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HAFNER, S., HUCKENHOLZ, H. Mössbauer Spectrum of Synthetic Ferri-diopside. Nature Physical Science 233, 9–11 (1971). https://doi.org/10.1038/physci233009a0

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