Eur. Phys. J. B 35, 371-375 (2003)
https://doi.org/10.1140/epjb/e2003-00289-9

Study by X-ray diffraction and Raman spectroscopy of a Dy@C₈₂ single crystal

¹ Department of Physics, Umeå University, 901 87 Umeå, Sweden
² Laboratoire de Physique des Solides, UMR CNRS 8502, Université Paris-Sud, 91405 Orsay, France
³ Department of Chemistry, Hong Kong University of Science and Technology, Clear Water Bay, Hong-Kong, P.R. China
⁴ Department of Physics, and Institute of Nano Science and Technology, Hong Kong University of Science and Technology, Clear Water Bay, Hong-Kong, P.R. China

Corresponding author: ^a moret@lps.u-psud.fr

Received: 15 May 2003
Revised: 29 August 2003
Published online: 15 October 2003

Abstract

We report the first X-ray diffraction and Raman spectroscopy study of a single crystal of the rare-earth endohedral fullerene Dy@C₈₂. The lattice is found to be body-centered cubic (a = 25.79 Å, space group which is at variance with previous reports and confirms that several types of structures can be stabilized in Dy@C₈₂. X-ray diffraction/diffuse scattering methods reveal no low-temperature change down to 12 K for the present structure. The Raman spectroscopy data are comparable to those of other M@C₈₂ endohedral compounds. However, the Dy oxidation state and the force constant of the low-frequency metal-cage stretching mode do not follow the simple relationship observed before.