Verteilung und Valenz der Kationen in Spinellsystemen mit Eisen und Chrom. III. Gitterkonstanten,Mößbauer-Spektren und Thermokraft der Mischkristalle ZnFeCrO4?Fe2CrO4 |
| |
Authors: | Marcel Stier-Wogan Sima Rabbani Erwin Riedel |
| |
Abstract: | Distribution and Valence of the Cations in Spinel Systems with Iron and Chromium. III. Lattice Constants, Mössbauer Spectra, and Seebeck Coefficients of the Solid Solution ZnFeCrO4? Fe2CrO4 For the spinel system Zn1–x2+Fex–λ2+Feλ3+(Feλ2+ · Fe1?λ3+ Cr3+)O4 λ has been determined by lattice constants and ionic distances: λ = 0 in the region 0 ? x ? 0.3; in the region 0.3 < x ? 1 λ increases linearly to 0.44. Mössbauer spectra between x = 0 and x = 0.6 confirm this distribution. All spinels are n-type hopping conductors mainly conducting on the octahedral sites. |
| |
Keywords: | Iron Chromium Spinels Valence Distribution Mö ssbauer Spectra Seebeck Coefficients |
|