Composition and stability of decagonal quasicrystals in the Zn-Mg-rare-earth systems

Decagonal quasicrystals in Zn-Mg-RE systems (RE = rare earth) have been studied for their composition and stability. The decagonal phase was shown to have the composition Zn Mg Dy in the Zn-Mg-Dy system. This phase 58 40 2 became a major phase after annealing and thus is apparently thermodynamically...

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Bibliographic Details
Published in:Philosophical magazine letters 1998-04, Vol.77 (4), p.213-219
Main Authors: Sato, Taku J., Abe, Eiji, Tsai, An Pang
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Metals. Metallurgy
Physics
Quasicrystals
Semi-periodic solids
Structure of solids and liquids
crystallography
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Summary:Decagonal quasicrystals in Zn-Mg-RE systems (RE = rare earth) have been studied for their composition and stability. The decagonal phase was shown to have the composition Zn Mg Dy in the Zn-Mg-Dy system. This phase 58 40 2 became a major phase after annealing and thus is apparently thermodynamically stable. Further, the decagonal phase was observed for RE = Y, Dy, Ho, Er, Tm and Lu. All these RE elements have Goldschmidt atomic diameters smaller than 3.55 A, suggesting that the atomic diameter is an intrinsic parameter in stabilizing the decagonal phase.
ISSN:0950-0839
1362-3036
DOI:10.1080/095008398178534