Structure of single-phase superconducting K3C60

Peter W. Stephens, Laszlo Mihaly, Peter L. Lee, Robert L. Whetten, Shiou Mei Huang, Richard Kaner, François Deiderich, Karoly Holczer

Research output: Contribution to journalArticlepeer-review

678 Scopus citations


RECENT reports1-3 of superconductivity in alkali-metal-doped compounds of the icosahedral C60 (buckminsterfullerene) molecule have attracted great experimental and theoretical interest. Superconductivity was originally discovered in samples prepared from gas-solid reactions1, which made it impossible to determine the composition or structure of the superconducting phase. Holczer et al.4 demonstrated that potassium-doped C60 has only a single stable superconducting phase, K3C60, with a transition temperature of 19.3 K. Improvements have since resulted in the preparation of 100% bulk superconductors3. Because of the absence of impurity phases, we have been able to perform accurate Rietveld analysis of X-ray diffraction data from the superconducting phase. Here we report our results for the crystal structure of K3C60, determining that this superconducting compound has a face-centred cubic structure with a well defined stoichiometry. These results should open the way to rigorous description of the normal and superconducting properties of this compound.

Original languageEnglish (US)
Pages (from-to)632-634
Number of pages3
Issue number6328
StatePublished - 1991
Externally publishedYes

ASJC Scopus subject areas

  • General


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