Crystal structure of the Al2CuIr phase

L. Meshi, V. Ezersky, D. Kapush, B. Grushko

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


A new ternary Al2CuIr phase was revealed in the Al-Cu-Ir system. It is formed below 1063 °C from the β-phase (CsCl-type structure) extending at elevated temperatures from AlIr. The crystal structure of the Al2CuIr phase was determined using a combination of precession electron diffraction and X-ray powder diffraction techniques. The phase has an orthorhombic C-centered unit cell with lattice parameters a = 8.1196(7) Å, b = 5.0646(2) Å and c = 5.18513(3) Å; its crystal symmetry can be described by the Cmme (no. 67) space group (Pearson symbol oC16). The unit cell of the new phase contains 8 Al, 4 Cu and 4 Ir atoms and exhibits a new structure type. The reliability factors characterizing the Rietveld refinement procedure are: Rp = 4.45%, Rwp = 6.45%, RB = 3.69% and Rf = 2.41%.

Original languageEnglish
Pages (from-to)208-211
Number of pages4
JournalJournal of Alloys and Compounds
Issue number1-2
StatePublished - 30 Apr 2010


  • Crystal structure and symmetry
  • Electron diffraction
  • Intermetallics
  • X-ray powder diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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