Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8000066 | Journal of Alloys and Compounds | 2015 | 19 Pages |
Abstract
The earlier reported Al-Ti-Pt phases Ï5 and Ï6 were studied using Precession Electron Diffraction (PED) and Convergent Beam Electron Diffraction (CBED). Their atomic models were proposed applying Direct Methods to the PED zonal data. The Ï5-phase (FeCr-type, P42/mnm, a = 9.702 and c = 5.023 Ã
) can be described by the formula Al2Ti5Pt3, positioning 18 Ti, eight Pt and four Al atoms at five unique atomic positions in the unit cell. The Ï6-phase (P213, a = 6.8477 Ã
) can be described by the formula Al3Ti5Pt2. Its unit cell consists of 20 atoms at 12b and two 4a atomic positions occupied by Ti, Pt and Al atoms, respectively. Due to deviation from the stoichiometry, the Ï6-phase can be related to a defect variant of the Au4Al-type structure. The structures of the studied phases are presented as the stacking of coordination polyhedra.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
S. Samuha, D. Pavlyuchkov, O.V. Zaikina, B. Grushko, L. Meshi,