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Temperature Dependent Structural Studies of K- and RB- Doped C60

Published online by Cambridge University Press:  25 February 2011

Otto Zhou ,
Qing Zhu ,
Gavin B.M. Vaughan ,
John E. Fischer ,
Paul A. Heiney ,
Nicole Coustel ,
John Mccauley Jr. ,
Amos B Smith III  and
David E. Cox
Otto Zhou
Affiliation:
Physics Department, Brookhaven National Laboratory, Upton, NY 11973
Qing Zhu
Affiliation:
Physics Department, Brookhaven National Laboratory, Upton, NY 11973
Gavin B.M. Vaughan
Affiliation:
Physics Department, Brookhaven National Laboratory, Upton, NY 11973
John E. Fischer
Affiliation:
Physics Department, Brookhaven National Laboratory, Upton, NY 11973
Paul A. Heiney
Affiliation:
Physics Department, Brookhaven National Laboratory, Upton, NY 11973
Nicole Coustel
Affiliation:
Physics Department, Brookhaven National Laboratory, Upton, NY 11973
John Mccauley Jr.
Affiliation:
Physics Department, Brookhaven National Laboratory, Upton, NY 11973
Amos B Smith III
Affiliation:
Physics Department, Brookhaven National Laboratory, Upton, NY 11973
David E. Cox
Affiliation:
Laboratory for Research on The Structure of Matter, University of Pennsylvania, Philadelphia, PA 19104
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Abstract

The temperature dependent structural evolutions of RbxC60 (x = 3, 5, 6) and K4C60 were studied using both in-house andsynchrotron x-ray powder diffraction and thermal analysis techniques over a temperature range of 10K - 673K. The superconducting face centered-cubic (fcc) Rb3C60 and the body centered-tetragonal (bct) M4C60(M = K, Rb) phases are found to be line compounds in this temperature range, while the body centered-cubic (bcc) phase forms a solid solution in which the solubility of vacant M sites increases with temperature. The orientation of the C60 molecules in the K4C60 phase was analyzed. A crystalline fcc Rb1C60 phase is stable only above room temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 270: Symposium M – Novel Forms of Carbon , 1992 , 191
Copyright
Copyright © Materials Research Society 1992

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References

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