A hexagonal phase related to quasicrystalline phases in Zn-Mg-rare-earth system
- 1 February 1998
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Letters
- Vol. 77 (2) , 95-104
- https://doi.org/10.1080/095008398178660
Abstract
The Z-Zn Mg Sm ternary phase has been studied by electron diffraction. Y 6 3 and the rare-earth elements with atomic radii just below that of Sm in Zn Mg RE 6 3 alloys (RE rare earth or Y) form the icosahedral phase, while with Sm it forms the Z phase. The Z phase is hexagonal with a = 12.4 A and c = 8.8 A, and with the space group P 6 / mmc . The relationship of this phase to the icosahedral 3 quasicrystal is demonstrated through diffraction features. It is shown that this hexagonal phase consists of three icosahedral units rotated by 120o about a common twofold axis, forming the sixfold axis. The similarity of this hexagonal phase to the hexagonal quasicrystal is shown.Keywords
This publication has 0 references indexed in Scilit: