Structure of Rb-III: novel modulated stacking structures in alkali metals

The crystal structure of Rb-III, stable between 13 and 17 GPa, has been determined from quasi-single-crystal x-ray diffraction data. It is orthorhombic, space group C222(1), with 52 atoms in the unit cell, and has an 8-10-8-8-10-8 stacking of 8- and 10-atom layers. The recently reported 84-atom stru...

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Bibliographic Details
Published in:Physical review letters 2002-04, Vol.88 (15), p.155503-155503, Article 155503
Main Authors: Nelmes, R J, McMahon, M I, Loveday, J S, Rekhi, S
Format: Article
Language:English
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Summary:The crystal structure of Rb-III, stable between 13 and 17 GPa, has been determined from quasi-single-crystal x-ray diffraction data. It is orthorhombic, space group C222(1), with 52 atoms in the unit cell, and has an 8-10-8-8-10-8 stacking of 8- and 10-atom layers. The recently reported 84-atom structure of Cs-III can be understood as an 8-8-10-8-8-8-8-10-8-8 stacking of the same layers. These represent a new class of modulated elemental structures.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.88.155503