Heat capacity of alpha-AlH3 and alpha-AlD3 at temperatures up to 1000 K

Авторы: Antonov V.E., Kolesnikov A.I., Markushkin Yu E., Palnichenko A.V., Ren Y., Sakharov M.K.
Журнал: J. Physics: Condensed Matter
Том: 20
Номер: 27
Год издания: 2008
Первая страница: 275204-1
Последняя страница: 275204-10
DOI: 10.1088/0953-8984/20/27/275204
Аннотация: The densest a modification of AlH(3) and AlD(3) is thermodynamically stable at high hydrogen pressures. At ambient pressure, alpha-AlH(3) and alpha-AlD(3) rapidly and irreversibly decompose to Al and H(2) or D(2) gas when heated to about 420 and 520 K, respectively. In the present paper, the heat capacities at constant volume (CV) and at constant pressure (CP) are calculated for alpha-AlH(3) and alpha-AlD(3) at a pressure of 1 atm and temperatures 0-1000 K using the phonon densities of states determined earlier by inelastic neutron scattering at helium temperatures (Kolesnikov et al 2007 Phys. Rev. B 76 064302). The C(P) ( T) dependence of AlH3 is also measured at temperatures 6-30 K and 130-320 K and that of AlD3 at 130-320 K in order to compensate for the scatter in the literature data and to improve the accuracy of the calculated C(V) and C(P) dependences at low temperatures.
Добавил в систему: Антонов Владимир Евгеньевич

	ИСТИНА	Войти в систему Регистрация
	ИСТИНА ИНХС РАН
	Главная Поиск Статистика О проекте Помощь

ИСТИНА