Structural characterization study of nickel ferrite particles dispersed in a corrosion product deposit layer

• Published in: Applied surface science Vol. 257; no. 4; pp. 1300 - 1305
• Main Authors: Kuri, G., Degueldre, C., Bertsch, J., Borca, C.N.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.12.2010; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Corrosion product deposits; Defects and impurities in crystals; microstructure; Exact sciences and technology; Physics; Spinel crystal; Structure of solids and liquids; crystallography; X-ray absorption spectroscopy; X-ray absorption spectroscopy: exafs, nexafs, xanes, etc; X-ray diffraction and scattering; 78.70.Dm; X-ray absorption spectroscopy; Spinel crystal; Corrosion product deposits; 28.52.Fa; 61.72.−y; Water; 61.72.-y; XANES; Iron; Ion distribution; EXAFS; Ferrites; Fine structure; X-ray absorption spectra; Spinels; Corrosion products; Cations; Nickel
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2010.08.052

Using X-ray absorption fine structure spectroscopy, both EXAFS and XANES, the cation distributions in NiFe 2O 4 particles dispersed in a corrosion product deposit layer have been studied. The specimen was obtained from a selected fuel rod used in a commercial boiling water reactor plant. EXAFS data allowed the quantitative determination of specific site distributions for all transition metal cations in Ni-ferrite deposits. The results show that the analyzed NiFe 2O 4 particles do not have a totally inverted spinel structure. The relative occupancy of iron and nickel cations in the tetrahedral and octahedral sites of the spinel lattice is determined from the measured data.