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Philosophical Magazine Volume 86, 2006 - Issue 3-5: Proceedings of the 9th International Conference on Quasicrystals, 22–26 May 2005, Part 1. Guest Editors: Cynthia J. Jenks, Daniel J. Sordelet and Patricia Thiel
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Original Articles

Chemical decoration in cubic approximant and quasicrystal in the Al–Cu–Fe system

V. Simonet Laboratoire Louis Néel, CNRS, BP 166, F-38042 Grenoble Cedex 9, France
,
F. Hippert LMGP, ENSPG, BP 46, F-38402 Saint Martin d'Hères Cedex, FranceCorrespondence[email protected]
,
R.A. Brand Department of Physics, Universität Duisburg-Essen, D-47048 Duisburg, Germany
,
Y. Calvayrac CECM/CNRS, 15 rue G. Urbain, F-94407 Vitry-sur-Seine Cedex, France
,
J. Rodriguez-CarvajaL Laboratoire Léon Brillouin (CEA-CNRS), CEA/Saclay, F-91191 Gif sur Yvette Cedex, France
&
A. Sadoc LPMS, Université de Cergy-Pontoise, F-95031 Neuville sur Oise Cedex, France
Pages 573-579 | Received 12 May 2005, Accepted 19 Jul 2005, Published online: 21 Aug 2006
 
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Abstract

The local order in the Al–Cu–Fe quasicrystal and in two of its approximants has been investigated by extended X-ray absorption fine structure (EXAFS) studies at the Cu and Fe K-edges. The chemical occupation of the crystallographic sites in the 1/1 cubic α-Al55Si7Cu25.5Fe12.5 phase is revisited. From these results, a model for the chemical short-range order in the Al62Cu25.5Fe12.5 quasicrystal is proposed.

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