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|Author(s):||Terrence J. Jach; Yanbao Zhang; R. Colella; M. De Boissieu; M. Boudard; A. I. Goldman; T Lograsso; D W. Delaney; S. Kycia;|
|Title:||Dynamical Diffraction and X-Ray Standing Waves from Atomic Planes Normal in a Twofold Symmetry Axis of the Quasicrystal A1PdMn|
|Published:||April 01, 1999|
|Abstract:||We have observed dynamical diffraction in the  and reflections of the icosahedral quasicrystal A1PdMn in the back-reflection geometry (θB = 90 ). The x-ray fluorescence from the Al and Pd atoms exhibits strong standing wave behavior, similar to that observed in crystalline materials. The data indicate a long-range order of each species of atoms, with the coherent positions attributable to distributions of the Al and Pd, which we compare to a centrosymmetric model. We observe deviations from the model which imply small departures from inversion symmetry along the twofold symmetry axis and from the expected coherent fractions for Al.|
|Citation:||Physical Review Letters|
|Pages:||pp. 2904 - 2907|
|Keywords:||Diffraction,dynamical diffraction,icosohedral,quasicrystal,standing waves,x-ray,x-ray diffraction,x-ray standing waves|