Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1619082 | Journal of Alloys and Compounds | 2010 | 4 Pages |
Abstract
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) Ã
, b = 5.0646(2) Ã
and c = 5.18513(3) Ã
; 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%.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
L. Meshi, V. Ezersky, D. Kapush, B. Grushko,