ALCHEMI study of an Al72Ni20Co8 decagonal quasicrystal

Koh Saitoh, Michiyoshi Tanaka, An Pang Tsai, Chris J. Rossouw

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Two-dimensional channelling patterns, derived from variations in characteristic X-ray emission rates as a function of incident electron beam orientation, have been recorded from an Al72Ni20Co8 decagonal quasicrystal for the first time. These channelling patterns indicate that the Al and transition metal atoms occupy different sets of sublattice sites, and that (to a good approximation) both Ni and Co atoms randomly occupy a similar set of sublattice sites, i.e. they are mutually disordered. This is shown to support the view that the structure of this alloy is determined primarily by the number of electrons per atom, e/a.

Original languageEnglish
Pages (from-to)2379-2382
Number of pages4
Journaljournal of the physical society of japan
Issue number8
Publication statusPublished - 2000 Aug
Externally publishedYes


  • Al-Ni-Co alloy
  • Chemical ordering
  • Decagonal quasicrystal
  • Electron compound
  • Electron microscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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