Триплатинадигафний

Триплатинадигафний
Общие
Систематическое
наименование		 Триплатинадигафний
Традиционные названия Дигафнийтриплатина
Хим. формула Pt3Hf2
Рац. формула Hf2Pt3
Физические свойства
Состояние кристаллы
Молярная масса 942,21 г/моль
Плотность 18,0 г/см³
Термические свойства
Температура
 • разложения 1670; 1630 °C
Классификация
Рег. номер CAS 12029-35-5
Приведены данные для стандартных условий (25 °C, 100 кПа), если не указано иное.

Триплатинадигафний — бинарное неорганическое соединение, интерметаллид платины и гафния с формулой Hf2Pt3, кристаллы.

Получение

  • Сплавление стехиометрических количеств чистых веществ:

Физические свойства

Триплатинадигафний образует кристаллы тетрагональной сингонии, пространственная группа I 4/mmm, параметры ячейки a = 0,343 нм, c = 0,873 нм, Z = 2 [1], структура типа дисилицида молибдена Mo2Si [2][3].

По другим данным, кристаллы ромбической сингонии, пространственная группа C mcm, параметры ячейки a = 1,4653 нм, b = 0,48741 нм, c = 0,48671 нм, Z = 4, структура типа трипалладийдититана Ti2Pd3 [4]. А при температуре выше 1630 °C происходит фазовый переход в кристаллы кубической сингонии, параметры ячейки a = 0,3315 нм[5].

Соединение образуется по перитектоидной реакции при температуре 1670 °C[2] (1630 °C[4]).

Примечания

  1. ↑ Данные параметры соответствуют бессмысленной плотности.
  2. ↑ 1 2 Диаграммы состояния двойных металлических систем / Под ред. Н. П. Лякишева. — М.: Металлургия, 1997. — Т. 2. — 1024 с. — ISBN 5-217-01569-1.
  3. ↑ B. Predel. Hf-Pt (Hafnium-Platinum) (англ.) // Landolt-Börnstein - Group IV Physical Chemistry. — 1996. — Vol. 5f. — P. 1. — doi:10.1007/10501684_1594.
  4. ↑ 1 2 Judith K. Stalick, Richard M. Waterstrat. The Hafnium-Platinum Phase Diagram (англ.) // Journal of Phase Equilibria and Diffusion. — 2014. — Vol. 35, no. 1. — P. 15—23. — doi:10.1007/s11669-013-0268-4. Архивировано 26 января 2022 года.
  5. ↑ J. K. Stalick, Ke Wang, R. M. Waterstrat. The Crystal Structure and Phase Transition of Hf2Pt3 (англ.) // Journal of Phase Equilibria and Diffusion. — 2013. — Vol. 34, no. 5. — P. 385—389. — doi:10.1007/s11669-013-0247-9.


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