Structure of a cubic phase related to Cd-Mg-rare-earth quasicrystals

Authors
Abe, E Guo, JQ Tsai, AP
Citation
E. Abe et al., Structure of a cubic phase related to Cd-Mg-rare-earth quasicrystals, PHIL MAG L, 81(8), 2001, pp. 563-568
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHILOSOPHICAL MAGAZINE LETTERS
ISSN journal
09500839 → ACNP
Volume
81
Issue
8
Year of publication
2001
Pages
563 - 568
Database
ISI
SICI code
0950-0839(200108)81:8<563:SOACPR>2.0.ZU;2-0
Abstract
The structure of a Cd68Mg12Dy20 crystalline phase denoted as the phi -phase , which has a composition close to that of the Cd(66)Mg(21)Dv(13) icosahedr al quasicrystalline phase. has been investigated by electron diffraction an d scanning transmission electron microscopy (STEM). The phase has a fcc lat tice with a = 21.6 Angstrom. High-angle annular dark-field STEM with Z cont rast confirms that the phase has the Cd45Sm11-type structure. The atomic cl uster in the structure is shown to be characterized by a Friauf polyhedron with tetrahedral symmetry.