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Low-temperature ordering and phase transitions in KC24and RbC24single crystals

Authors
Journal
Synthetic Metals
0379-6779
Publisher
Elsevier
Publication Date
Volume
12
Identifiers
DOI: 10.1016/0379-6779(85)90085-2

Abstract

Abstract Single-crystal X-ray diffraction experiments have been performed on KC 24 and RbC 24 in order to study the influence of temperature on the ordering of the alkali metal layers from 300K to 20K. Some important and new data are briefly reported here. In particular, the 95K transition of KC 24 is found to correspond to the breaking of the 2D hexagonal symmetry of the K layer. In contrast, this symmetry is preserved in RbC 24 below the 160K ordering transition and down to 20K. A strong intermodulation with the graphite potential generates satellites reflections which are visible up to the third-order.

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