Structure of Rb-III: Novel Modulated Stacking Structures in Alkali Metals

R. J. Nelmes, M. I. McMahon, J. S. Loveday, and S. Rekhi
Phys. Rev. Lett. 88, 155503 – Published 1 April 2002
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Abstract

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 C2221, 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.

  • Received 31 January 2002

DOI:https://doi.org/10.1103/PhysRevLett.88.155503

©2002 American Physical Society

Authors & Affiliations

R. J. Nelmes, M. I. McMahon, J. S. Loveday, and S. Rekhi

  • Department of Physics and Astronomy and Centre for Science at Extreme Conditions, The University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom

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Vol. 88, Iss. 15 — 15 April 2002

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