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1989 (1)
1Author    Erwin Riedel, Jörg Kahler, N. Orbert PfeilRequires cookie*
 Title    Verteilung und Valenz der Kationen in Spinellsystemen mit Eisen und Vanadium, VIII Gitterkonstanten, Mößbauer-Spektren und elektronische Eigenschaften der Mischkristallreihe FeV20 4—Fe30 4 Distribution and Valence of the Cations in Spinel Systems with Iron and V anadium , VIII Lattice Constants, M össbauer Spectra and Electronic Properties of the Solid Solution FeV20 4—Fe30 4  
 Abstract    From lattice constants and M össbauer data the valence distribution and an energy-level diagram o f the spinel system F e(F evV 2_t) 0 4 have been derived. In the range 0.3 < x ^ 1.5 the transition from normal to inverse spinels takes place. The M ößbauer spectra with 1.0 < jc ^ 2.0 consist o f two sets o f sextets corresponding to tetrahedral and octahedral sites. Typical values o f isom er shift and internal m agnetic field strength due to the different environments o f the iron ion result from the superim posed sextets o f the octahedral site pattern. Neighbouring V ions enhance the conduc­ tion electron density and diminish the strength o f the magnetic interaction. M ößbauer data, Seebeck coefficients and activation energies lead to a m odel of both tetrahedral and octahedral conduction based on charge hopping. For F e1.gV 1. | 0 4 there exists only one iron species. 
  Reference    Z. Naturforsch. 44b, 1427 (1989); eingegangen am 20. Juni 1989 
  Published    1989 
  Keywords    Iron-Vanadium Spineis, M össbauer Spectra, V alence Distribution, Charge H opping, Seebeck Effect 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-1427.pdf 
 Identifier    ZNB-1989-44b-1427 
 Volume    44