TOPFER, J and FELTZ, A and GRAF, D and HACKL, B and RAUPACH, L and WEISSBRODT, P (1992) CATION VALENCIES AND DISTRIBUTION IN THE SPINELS NIMN2O4 AND MZNIMN2-ZO4 (M = LI, CU) STUDIED BY XPS. PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 134 (2). pp. 405-415. ISSN 0031-8965,
Full text not available from this repository.Abstract
Photoelectron spectroscopic investigations (XPS) of the spinels NiMn2O4 and MzNiMn2-zO4 (M = Li, Cu) in comparison with Mn2TiO4, ZnMn2O4, and MgNiMnO4, containing Mn in only one oxidation state, show that in the former compounds Mn(II), Mn(III), and Mn(IV) are present. By a fitting process yielding the amounts of the Mn ions in the different oxidation states it is possible to determine the cation distribution of NiMn2O4 which is characterized by a high inversion parameter and a considerable degree of disproportionation. Cation valencies and their distribution in the substituted spinels are discussed. An increasing concentration of Mn(IV) with higher values of z is reflected in the spectra by shift of the Mn p signals and by changes in their shape.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | X-RAY PHOTOELECTRON; NICKEL MANGANITE; SPECTROSCOPY; SYSTEMS; COPPER; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/54252 |
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