1. Structural studies of SrFeO3 and SrFe0.5Nb0.5O3 by employing XRD and XANES spectroscopic techniques
- Author
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Akhtar, M. Javed and Khan, R. Tahir Ali
- Subjects
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STRONTIUM compounds , *X-ray diffraction , *X-ray absorption near edge structure , *PEROVSKITE , *SOLID state chemistry , *CHEMICAL reactions , *INORGANIC synthesis - Abstract
Abstract: The perovskite based SrFeO3 and SrFe0.5Nb0.5O3 materials have been synthesized by solid state reaction methods. The structural properties are investigated using a combination of X-ray diffraction and X-ray absorption fine structure spectroscopic techniques. From the Rietveld refinement of the X-ray diffraction data it has been observed that SrFeO3 has a simple cubic perovskite structure, which is consistent with the previous literature results; whereas SrFe0.5Nb0.5O3 shows a tetragonal structure within P4mm space group. X-ray absorption results demonstrate that the valence state of Fe in SrFeO3 is (IV); however, it changes to (III) when 50% Nb5+ is substituted at the Fe sites. [Copyright &y& Elsevier]
- Published
- 2011
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