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0403U003299,
к.х.н.
25-09-2003
o
Phase equilibria and crystal structure of compounds in the Ce-Ag-Ga, Tb-Ag-{Al, Ga} systems and some related
Gumeniuk Roman Vasyliovych,
popup.head Kuz'ma Yurii Bohdanovych
popup.opponent Поторій Марія Василівна
popup.opponent Заремба Василь Іванович
Побудовано ізотермічні перерізи діаграм стану систем Gd-Cu-Al (873 К), Tb-Ag-Al (873 К), Ce-Ag-Ga (573 К), Tb-Ag-Ga (873 К і 573 К), Yb-Ag-Ga і Yb-Au-Ga (873К). Вперше одержано 15 тернарних алюмінідів, 19 тернарних галідів і встановлено їх кристалічну структуру. Для 9 раніше відомих сполук уточнено координати, спосіб розподілу і теплові параметри атомів. Представниками нових структурних типів є галіди: YbAu4.2Ga1.8 (ПГ Im3, а = 1,4727(2) нм), YbAg3.1Ga2.6 (ПГ Im3, а = 1,47386(1) нм), YbAg3.6Ga1.9 (ПГ Cmmm, a = 0,91632(2), b = 2,35412(4), c = 0,91765(2) нм) i YbAg2.5Ga2.1 (P6/mmm, a = 0,96619(1), c = 0,91170(1) нм). Проведено порівняльний аналіз взаємодії компонентів в системах Ln-{Cu, Ag, Au}-{Al, Ga}. Встановлено кристалохімічні особливості структурних типів тернарних сполук. Досліджено магнітні властивості деяких тернарних галідів та зроблено висновки про валентний стан атомів РЗМ у цих сполуках.
2003-09-25
2020-04-04
Updated: 2025-12-07
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