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Phase equilibria and structural investigation of new intermetallics of the Ce-Ru-Sn ternary systemтезисы доклада
- Авторы: Gribanova V., Murashova E., Gribanov A., Kalmykov K.
- Сборник: Book of Abstracts 19-th International Conference on Solid Compounds of Transition Elements
- Тезисы
- Год издания: 2014
- Место издания: Universita degli Studi di Genova Genova, Italy
- Первая страница: 147
- Последняя страница: 147
- Аннотация: The ternary system Ce–Ru–Sn was investigated by means of single crystal and powder X-ray diffraction, differential thermal analysis (DTA) and scanning electron microscopy in combination with energy dispersive X-ray spectroscopy. Isothermal sections at 720 °C were constructed. The four ternary intermetallics Ce3Ru4Sn13 (space group Pm-3n, structure type Pr3Rh4Sn13), CeRuSn3 (space group Pm-3n, structure type Pr3Rh4Sn13), CeRu4Sn6 (space group I-42m, structure type YRu4Sn6), CeRuSn (space group C2/m, derived from CeCoAl structure type) already known from the literature, were confirmed. Besides them five new phases were detected at 720 °C. The crystal structures of two of them – Ce13Ru2Sn5 (I4/mcm, a=b=22.8999(2) Ǻ, c=9.1668(1) Ǻ) and Ce3RuSn6 (Cmcm, a=4.6744(4)Ǻ, b=16.8542(15) Ǻ, c=13.3227(12) Ǻ) were determined by single crystal X-ray diffraction as well the polymorphic modification of CeRuSn (C2/m, a=11.5702(4) Ǻ, b=4.7429(5) Ǻ, c=15.2414(11) Ǻ). The homogeneity regions of the binary Ce5Sn3 and CeRu2 compounds were firstly determined. The solid solution based on a Ce5Sn3 compound dissolves up to 16 atomic percent of ruthenium, while CeRu2 dissolves up to 12 atomic percent of tin and the homogeneity region stretches along the isoconcentrate of cerium, indicating substitution of ruthenium atoms by tin atoms. The CeRuSn3 and Ce3Ru4Sn13 phases were established to refer to the same type of structure (Pr3Rh4Sn13) with Ce3+xRu4Sn13-x (0≤x≤1) variable composition. The crystal structures of selected phases were studied by means of powder X-ray diffraction techniques and are briefly discussed.
- Добавил в систему: Грибанов Александр Викторович