Iron-57 Mössbauer spectroscopy study of phases in the CaZrTi2−2x Nb x Fe x O7 zirconolite system |
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| Authors: | Frank J. Berry Gregory R. Lumpkin Gordon Oates Karl R. Whittle |
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| Affiliation: | (1) Department of Chemistry, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK;(2) Department of Earth Sciences, University of Cambridge, Cambridge, CB2 3EQ, UK |
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| Abstract: | Materials of composition CaZrTi2?2x Nb x Fe x O7 with the fluorite-related zirconolite structure have been prepared. The 57Fe Mössbauer spectra show that iron is initially located in the five co-ordinate cation sites. As the iron content increases the iron enters the octahedral sites until, at a composition CaZrTi0.4Nb0.8Fe0.8O7, ca. 50% of the iron is five co-ordinate and the remainder is located in the octahedral sites. |
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| Keywords: | zirconolite 57Fe M?ssbauer spectra |
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