Near-edge forbidden reflections in resonant diffraction by modulated crystals
نویسندگان
چکیده
منابع مشابه
Phase transition of KDP observed by Resonant X-ray Diffraction at forbidden reflections
We report observations of space-group-forbidden Bragg re ections in Potassium Dihydrogen Phosphate (KH2PO4), also known as KDP, measured by resonant x-ray di raction at the potassium K edge. We nd clear evidence for a transition from one class of space-groupforbidden re ections, where scattering is ruled out by the electric dipole approximation, to a second class, in the ferroelectric phase, wh...
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We have performed a complete resonant x-ray scattering (RXS) study at the Mn Kedge of LaMnO3. (h 0 0), (0 k 0) and (0 0 l) reflections with h, k and l=odd, were measured between 10 and 300 K. We observed strong resonant peaks at the three types of reflections. They exhibit dipolar character with a change of the light polarization plane from σ to π. The azimuth angular dependence of all these re...
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Despite being one of the oldest known magnetic materials, and the classic mixed valence compound, thought to be charge ordered, the structure of magnetite below the Verwey transition is complex and the presence and role of charge order is still being debated. Here, we present resonant x-ray diffraction data at the iron K-edge on forbidden (0, 0, 2n+1)(C) and superlattice [Formula: see text] ref...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations of Crystallography
سال: 2005
ISSN: 0108-7673
DOI: 10.1107/s0108767305081791