Crystal structure of Rb{sub 4}C{sub 60} under pressure: X-ray diffraction experiments
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Intense Pulsed Neutron Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Department of Physics and Astronomy, State University of New York, Stony Brook, New York 11794 (United States)
We show that Rb{sub 4}C{sub 60} transforms from its orientationally disordered tetragonal structure at ambient pressure to an orthorhombic phase in the neighborhood of 0.4 GPa. Lattice parameters, interfullerene distances, and closest Rb-C distances evolve continuously up to 2.2 GPa. Rietveld refinements establish that the high pressure phase is isostructural to Cs{sub 4}C{sub 60}. The previously observed conducting phase at 0.8 GPa is therefore structurally distinct from the ambient pressure insulator.
- OSTI ID:
- 20853554
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 7 Vol. 74; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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