Determination of Cation Distribution in ZnFe2O4, NiFe2O4 and NiAl2O4 Spinels by An In-house Anomalous X-ray Scattering Method

K. Shinoda, K. Sugiyamat, K. Omote, Y. Waseda

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5 Citations (Scopus)

Abstract

An in-house anomalous X-ray scatterig (AXS) method has been done for determining cation distribution in ZnFe2O4, NiFe2O4 and NiAl2O4 spinels using the anomalous dispersion effect near the K absorption edges of Zn and Ni. When introduced the ratio (x) of the number of divalent cations of M element, MA, residing in the tetrahedral A-site to the total number of M element, x=MA/Mtotal, the measured intensity ratios of three reflection peaks with two energies close to the K edge of Zn or Ni can be quantitatively explained only by assigning the case where ZnFe2O4 is the normal type (x=1.0) and NiFe2O4 is the inverse type (x=0.0) spinel structure. On the other hand, the results for NiAl2O4 suggests that 15% of Ni2+ cations occupy the tetrahedral A-site (x=0.15) and the rest are octahedrally coordinated. The usefulness of the in-house AXS method is rather surprisingly well-recognized, particularly for obtaining the cation distribution in crystalline materials containing two elements of nearly the same atomic number.

Original languageEnglish
Pages (from-to)20-29
Number of pages10
JournalInternational Journal of the Society of Materials Engineering for Resources
Volume4
Issue number1
DOIs
Publication statusPublished - 1996 Jan 1

Keywords

  • Anomalous X-ray Scattering
  • Cation Distribution
  • In-house Facility

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Science(all)
  • Mechanical Engineering

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