Phason strain and structural perfection in the Zn-Mg-rare-earth icosahedral phases

A. Létoublon, I. R. Fisher, T. J. Sato, M. De Boissieu, M. Boudard, S. Agliozzo, L. Mancini, J. Gastaldi, P. C. Canfield, A. I. Goldman, A. P. Tsai

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


The structural perfection of eight samples of icosahedral Zn-Mg-R (R = Y, Ho and Tb) single grains has been studied by high resolution X-ray diffraction. Four samples present a systematic peak shift proportional to Qper characteristic of a linear phason strain. Two other samples present a peak splitting proportional to Qper. Only two samples had their Bragg peak position corresponding to the ideal one, with a width increasing linearly with Qper. The perfection of one of these last two samples was investigated by synchrotron monochromatic X-ray topography. It was found to be a microstructure similar to the one exhibited by conventional crystals grown by the same technique (flux-growth).

Original languageEnglish
Pages (from-to)127-130
Number of pages4
JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Publication statusPublished - 2000 Dec 15


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