| 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 [024024] and[046046] 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 |
| Volume: |
82 |
| Pages: |
pp. 2904 - 2907 |
| Keywords: |
Diffraction;dynamical diffraction;icosohedral;quasicrystal;standing waves;x-ray;x-ray diffraction;x-ray standing waves |
| Research Areas: |
Spectroscopy |
