ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
On Perovskite Phases of the System Ba2Y0,67U1-xWxO6A solid solution series is formed between the polymorphic perovskites Ba2Y0.67UO6 and Ba2Y0.67WO6 (cubic: a = 8.372 Å; hexagonal: a = 4× 5.881 Å and c = 4× 7.778 Å). The structure is cubic between x = 0.1 and 0.99 and for x 〉 0.95 hexagonal as well. Strong deviations from the ideal behaviour are detectabel with spectroscopic methods. The shape of the UO6 and WO6 octahedrons experiences only minor changes within the series.
Notes:
Die polymorphen Perowskite Ba2Y0,67UO6 und Ba2Y0,67 WO6 (kubisch: a = 8,372 Å; hexagonal: a = 4× 5,881 Å und c = 4× 7,778 Å) bilden Mischkristalle. Diese kristallisieren zwischen x = 0,1 und 0,99 kubisch und für x 〉 0,95 ebenfalls hexagonal. Mit spektroskopischen Methoden sind starke Abweichungen vom idealen Verhalten feststellbar. Die Gestalt der UO6- und WO6-Oktaeder erfährt innerhalb der Mischkristallreihe nur geringfügige Änderungen.
Additional Material:
13 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19764240305
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