Abstract
The crystal and local structures of compounds formed in the Dy2O3–HfO2 system (at molar ratios from 1: 3 to 3: 1) in the course of isothermal annealing of X-ray amorphous mixed hydroxides at temperatures up to 1600°C have been studied. At the molar ratio Dy2O3: HfO2 from 1: 3 to 1: 1, crystallization leads to formation of single-phase defect fluorite solid solutions nDy2O3 ∙ mHfO2 with clearly pronounced nonequivalence of parameters of local environment of Dy3+ and Hf4+ cations. It has been found that Dy2H2O7 (Dy2O3: HfO2 = 1: 2) samples have a tendency to pyrochlore-type ordering in both the cationic and anionic sublattices.
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Original Russian Text © V.V. Popov, A.P. Menushenkov, Ya.V. Zubavichus, A.A. Yaroslavtsev, D.S. Leshchev, E.S. Kulik, A.A. Yastrebtsev, A.A. Pisarev, S.A. Korovin, N.A. Tsarenko, 2016, published in Zhurnal Neorganicheskoi Khimii, 2016, Vol. 61, No. 9, pp. 1192–1200.
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Popov, V.V., Menushenkov, A.P., Zubavichus, Y.V. et al. Specific features of the crystal and local structures of compounds formed in the Dy2O3–HfO2 system. Russ. J. Inorg. Chem. 61, 1135–1143 (2016). https://doi.org/10.1134/S0036023616090175
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DOI: https://doi.org/10.1134/S0036023616090175