Low Temperature Physics: 29, 445 (2003); https://doi.org/10.1063/1.1542509 (4 pages)
Fizika Nizkikh Temperatur: Volume 29, Number 5 (May 2003), p. 597-602    ( to contents , go back )

Intercalation of fullerite C60 by helium and argon

Yu.E. Stetsenko, I.V. Legchenkova, K.A. Yagotintsev, A.I. Prokhvatilov, and M.A. Strzhemechny

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Science of Ukraine, 47 Lenin Ave., Kharkov, 61103, Ukraine
E-mail: legchenkova@ilt.kharkov.ua
pos Анотація:

Received January 30, 2003

Abstract

Powder x-ray diffraction was employed to study the effect of the doping by helium and argon atoms on the structure characteristics of fullerite C60. The samples were saturated at room temperature and normal pressure. The temporal dependences of the lattice parameter and the halfwidth of some reflections allow us to conclude that the voids in the C60 lattice are filled by helium in two stages. In the beginning, helium fills relatively quickly the octahedral voids, after which - at a much slower rate - the tetrahedral system. We have documented effects of both intercalants on the reflection widths and intensities, the lattice parameter of the matrix, the orientational phase transition, the molar volume jump at the transition, as well as the thermal expansivity of C60.

PACS:
61.10.Nz - X-ray diffraction
81.05.Tp - Fullerenes and related materials
64.70.-p - Specific phase transitions

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