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Anion Ordering in Fluorinated La2CuO4 by A.M. Abakumov; J. Hadermann; G. Van Tendeloo; R.V. Shpanchenko; P.N. Oleinikov; E.V. Antipov is a Materials Science article available to read on EtoBox.
What is Anion Ordering in Fluorinated La2CuO4 about?
La2CuO4 has been fluorinated using XeF2 as a soft fluorinating agent at temperatures ranging from 200 to 400°C. The structure of the fluorinated samples was studied by a combination of X-ray diffraction (XRD), electron diffraction (ED), high-resolution electron microscopy (HREM), and microanalysis. XRD shows the sequential changes with increasing temperature of the XeF2 treatment. A significant structural rearrangement, associated with the formation of a tetragonal K2NiF4-type structure (Icentered lattice with cell parameters a ؍ 4.0383( 6) A s , c ؍ 13.093(3) A s ) occurs at 250°C. Samples annealed at 300 and 400°C reveal the formation of a new monoclinic phase (a+17.36 A s , b+5.62 A s , c+10.59 A s , +91.5°; SG, C2/m). The structural model, deduced from ED and HREM, involves the filling of part of the interstitial positions by fluorine atoms with removal of the neighboring oxygen, resulting in the formation of a fluorite-like arrangement of the La(O, F) layers. The fluorite-type and NaCl-type slabs alternate along the [110] direction of the K2NiF4 subcell in an ordered array. Several crystallites also show an incommensurate superstructure which is explained as a pseudoperiod
Who reads Anion Ordering in Fluorinated La2CuO4?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- A.M. Abakumov; J. Hadermann; G. Van Tendeloo; R.V. Shpanchenko; P.N. Oleinikov; E.V. Antipov
- Publisher
- Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0022-4596)
- Published
- 1999
- Language
- EN
- Field
- Materials Science (Physical Sciences)