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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • V. E. Antonov
  • A. I. Kolesnikov
  • Yu E. Markushkin
  • A. V. Palnichenko
  • M. K. Sakharov

Detail(s)

Original languageEnglish
Article number275204
Journal / PublicationJournal of Physics Condensed Matter
Volume20
Issue number27
Publication statusPublished - 9 Jul 2008
Externally publishedYes

Abstract

The densest α modification of AlH3 and AlD3 is thermodynamically stable at high hydrogen pressures. At ambient pressure, α-AlH3 and α-AlD3 rapidly and irreversibly decompose to Al and H2 or D2 gas when heated to about 420 and 520K, respectively. In the present paper, the heat capacities at constant volume (CV) and at constant pressure (CP) are calculated for α-AlH3 and α-AlD3 at a pressure of 1atm and temperatures 0-1000K 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 CP(T) dependence of AlH3 is also measured at temperatures 6-30K and 130-320K and that of AlD3 at 130-320K in order to compensate for the scatter in the literature data and to improve the accuracy of the calculated CV and CP dependences at low temperatures. © 2008 IOP Publishing Ltd.

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Citation Format(s)

Heat capacity of α-AlH3 and α-AlD3 at temperatures up to 1000 K. / Antonov, V. E.; Kolesnikov, A. I.; Markushkin, Yu E.; Palnichenko, A. V.; Ren, Y.; Sakharov, M. K.

In: Journal of Physics Condensed Matter, Vol. 20, No. 27, 275204, 09.07.2008.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review