ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
The oxygen parameters u of the spinels CdV2O4 (a = 8.695 Å; u = 0.394), FeV2O4 (a = 8.453 Å; u = 0.386) and ZnV2O4 (a = 8.409 Å; u = 0.385) have been determined. Alinear relation between a and u of the V(III) spinels MV2O4 (M = Cd, Co, Fe, Mg, Mn, Zn) has been found. If tetrahedrally coordinated cations with small radii are replaced by cations with larger radii, a and u increase simultaneously in such a way, that the hole at the tetrahedral site increases while that at the octahedral site remains constant (V—O = 2.024 Å). From ionic distances ionic radii have been derived. They are compared with values from the literature.
Notes:
Es wurden die Sauerstoffparameter u der Spinelle CdV2O4 (a = 8,695 Å; u = 0,394), FeV2O4 (a = 8,543 Å; u = 0,386) und ZnV2O4 (a = 8,409 Å, u = 0,385) bestimmt. Zwischen a und u der V(III)-Spinelle MeV2O4 (Me = Cd, Co, Fe, Mg, Mn, Zn) besteht ein linearer Zusammenhang. Bei Ersatz von kleineren durch größere Tetraederkationen vergrößern sich a und u gleichzeitig so, daß die Oktaederlücke unverändert groß bleibt (V—O = 2,024 Å), die Tetraederlücke wächst. Aus den Ionenabständen werden Ionenradien berechnet und mit Literaturwerten verglichen.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19693690320
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