Structural study of the disordered RECd6 quasicrystal approximants (RE = Tb, Ho, Er, Tm and Lu)

Abstract

The crystal structures of approximants RECd6 (RE = Tb, Ho, Er, Tm and Lu) have been refined from single crystal X-ray diffraction data. This work is a continuation of a previous study of MCdg approximants [1] in which the different types of disorder of the central Cd4 tetrahedra located in the dodecahedral cavities were examined. The structures of the title compounds are all similar to GdCd6 and disorder was observed in all these compounds. There is a correlation between the anisotropic displacement parameter and the unit cell dimension. © 2006 Verlag der Zeitschrift für Naturforschung.