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The Stability of Icosahedral Cd-Yb

Published online by Cambridge University Press:  01 February 2011

Günter Krauss ,
Sofia Deloudi ,
Andrea Steiner ,
Walter Steurer ,
Amy R. Ross  and
Thomas A. Lograsso
Günter Krauss
Affiliation:
Laboratory of Crystallography, Department of Materials, Swiss Federal Institute of Technology, CH-8092 Zurich, Switzerland
Sofia Deloudi
Affiliation:
Laboratory of Crystallography, Department of Materials, Swiss Federal Institute of Technology, CH-8092 Zurich, Switzerland
Andrea Steiner
Affiliation:
Laboratory of Crystallography, Department of Materials, Swiss Federal Institute of Technology, CH-8092 Zurich, Switzerland
Walter Steurer
Affiliation:
Laboratory of Crystallography, Department of Materials, Swiss Federal Institute of Technology, CH-8092 Zurich, Switzerland
Amy R. Ross
Affiliation:
Ames Laboratory, Ames, IA, USA
Thomas A. Lograsso
Affiliation:
Ames Laboratory, Ames, IA, USA
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Abstract

The stability of single-crystalline icosahedral Cd-Yb was investigated using X-ray diffraction methods in the temperature range 20 K ≤ T ≤ 900 K at ambient pressure and from ambient temperature to 873 K at about 9 GPa. Single-crystals remain stable at low temperatures and in the investigated HP-HT-regime. At high temperatures and ambient pressure, the quasicrystal decomposes. The application of mechanical stress at low temperatures yields to the same decomposition, the formation of Cd. A reaction of icosahedral Cd-Yb with traces of oxygen or water causing the decomposition seems reasonable, but a low-temperature instability of this binary quasi-crystal cannot be ruled out totally.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 805: Symposium LL – Quasicrystals , 2003 , LL1.8
Copyright
Copyright © Materials Research Society 2004

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References

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