|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
The crystal structure of two novel cage-like aluminidesтезисы доклада
- Авторы: Sergey Nesterenko, Anna Tursina, Victoriya Avzuragova
- Сборник: Book of abstracts of The 21st International Conference on Solid Compounds of Transition Elements
- Тезисы
- Год издания: 2018
- Место издания: Technische Universitat Wien Wien Wien
- Первая страница: 18
- Последняя страница: 18
- Аннотация: Two novel intermetallic compounds from Al-rich region of the Ce-Rh-Al phase diagram were synthesized using arc-melting technique. The crystal structure of Ce2Rh3Al14 was analyzed by means of powder Х-ray diffraction and Rietveld analysis. In the case of Ce3Rh7Al29, structure determination was performed using single-crystal X-ray diffraction data. Single crystals were selected from crashed polycrystalline ingots. The compound Ce3Rh7Al29 of the new structure type crystallizes in orthorhombic space group (SG) Cmcm,Pearson symbol oC156 with a=9.1570(4), b=31.3790(14), с=8.9414 (17) Е, V=2569.2(17) Е3. Intermetallics Ce2Rh3Al14 has a tetragonal structure closely related to Ce2Ru3Al15†, SG I41/amd, Pearson symbol tI136, a=9.0000(15), c=31.7640(11) Е), V=2572.9(6) Е3. Three cerium atoms (4c site) in Ce3Rh7Al29 and two cerium atom (8e site) in Ce2Rh3Al14 are coordinated by 18 and 20 Rh and Al atoms, forming the 3D- frameworks of large icosahedral voids. This feature resembles the high coordinated Ce environment seen in CeRh4Al15.7 and CeRh2Al10. With the exception of the disordered Ce1 in Ce3Rh7Al29, the closest Ce-Ce contacts in both compounds are about 4.5 Е.
- Добавил в систему: Нестеренко Сергей Николаевич
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Тезисы доклада | 18.pdf | 474,5 КБ | 19 декабря 2018 [Anna_Tursina] |