Specific features of the crystal and local structures of compounds formed in the Dy2O3–HfO2 system
| Autor: | Alexey P. Menushenkov, A. A. Yastrebtsev, S. A. Korovin, Eleonora Kulik, N. A. Tsarenko, Ya. V. Zubavichus, A. A. Pisarev, Denis Leshchev, Alexander Yaroslavtsev, Victor Popov |
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| Rok vydání: | 2016 |
| Předmět: |
Chemistry
Materials Science (miscellaneous) Cationic polymerization 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorite 0104 chemical sciences law.invention Amorphous solid Inorganic Chemistry Crystal Crystallography law Molar ratio Local environment Physical and Theoretical Chemistry Crystallization 0210 nano-technology Solid solution |
| Zdroj: | Russian Journal of Inorganic Chemistry. 61:1135-1143 |
| ISSN: | 1531-8613 0036-0236 |
| DOI: | 10.1134/s0036023616090175 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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