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Systematics and anomalies in formation and crystal structures of RScSbстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 12 марта 2014 г.
- Авторы: Provino A., Paudyal D., Morozkin A.V., Manfrinetti P., Gschneidner Jr K.A.
- Журнал: Journal of Alloys and Compounds
- Том: 587
- Год издания: 2014
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 783
- Последняя страница: 789
- DOI: 10.1016/j.jallcom.2013.10.197
- Аннотация: A systematic study of RScSb (R = rare earth) ternary alloys has been carried out by X-ray diffraction, optical and electron microscopy and microprobe analysis. As a result, the new equiatomic RScSb (R = La–Nd,Sm, Gd–Tm, Lu, Y) compounds have been identified. No formation of equiatomic 1:1:1 phases has been observed for Eu and Yb. It has been found the RScSb compounds crystallize in two different crystal structures. The phases formed by the lighter R (La–Nd, Sm) adopt the CeScSi-type (tetragonal tI12, I4/mmm, an ordered variant of the La2Sb-type), while the ones containing the heavier R (R = Gd–Tm, Lu, Y) crystallize with the CeFeSi-type (tetragonal tP6, P4/nmm, an ordered derivative of the Cu2Sb-type). The latter phases were expected to be dimorphic, thus suggesting they might be polymorphic having the CeScSi-type as the low-temperature form; however, no proof of this was found in the course of the present study. Besides the equiatomic compounds, the R3Sc2Sb3 phases have also been identified. They form from Gd-Tm, Lu, included Y, and crystallize in the b-Yb5Sb3-type (orthorhombic oP32, Pnma). The observed lattice parameters, unit cell volume and volume contraction, for both the series of compounds, decrease on going from La to Lu following the lanthanide contraction trend. First principles calculations pinpoint that the differences in the electronic structure are directly related to the differences in the crystal structures of these compounds.
- Добавил в систему: Морозкин Александр Владимирович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Systematics and anomalies in formation and crystal structures of RScSb | RScSb-R3Sc2Sb3-m.pdf | 1,5 МБ | 7 марта 2014 [morozkin] |