Al-Cu-Ru: An icosahedral alloy without phason disorder

C. A. Guryan, A. I. Goldman, P. W. Stephens, K. Hiraga, A. P. Tsai, A. Inoue, T. Masumoto

Research output: Contribution to journalArticlepeer-review

100 Citations (Scopus)


We present high-resolution x-ray diffraction mesaurements of the recently discovered face-centered icosahedral phase of Al65Cu20Ru15. Analysis of the diffraction-peak profiles shows that this alloy is better ordered than the simple-icosahedral alloys previously studied. In particular, the peak broadening is well accounted for by simple lattice strain, with no measurable dependence of the peak widths on phason momentum. This implies a significantly diminished role for phason disorder in this system relative to the simple-icosahedral alloys.

Original languageEnglish
Pages (from-to)2409-2412
Number of pages4
JournalPhysical review letters
Issue number20
Publication statusPublished - 1989
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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