Über Perowskitphasen des Systems Ba2Y0,67U1−xWxO6 |
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Authors: | H J Schittenhelm S Kemmler-Sack |
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Abstract: | On Perovskite Phases of the System Ba2Y0,67U1?xWxO6 A 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. |
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