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Title: Correct interpretation of diffraction properties of quartz crystals for X-ray optics applications

Journal Article · · Journal of Applied Crystallography (Online)

Quartz has hundreds of strong Bragg reflections that may offer a great number of choices for making fixed-angle X-ray analyzers and polarizers at virtually any hard X-ray energies with selectable resolution. However, quartz crystals, unlike silicon and germanium, are chiral and may thus appear in two different forms of handedness that are mirror images. Furthermore, because of the threefold rotational symmetry along thecaxis, the {h1h2h3L} and {h2h1h3L} Bragg reflections may have quite different Darwin bandwidth, reflectivity and angular acceptance, although they have the same Bragg angle. The design of X-ray optics from quartz crystals therefore requires unambiguous determination of the orientation, handedness and polarity of the crystals. The Laue method and single-axis diffraction technique can provide such information, but the variety of conventions used in the literature to describe quartz structures has caused widespread confusion. The current studies give detailed guidelines for design and fabrication of quartz X-ray optics, with special emphasis on the correct interpretation of Laue patterns in terms of the crystallography and diffraction properties of quartz. Furthermore, the quartz crystals examined were confirmed by X-ray topography to have acceptably low densities of dislocations and other defects, which is the foundation for developing high-resolution quartz-based X-ray optics.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1421955
Journal Information:
Journal of Applied Crystallography (Online), Vol. 51, Issue 1; ISSN 1600-5767
Publisher:
International Union of CrystallographyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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Cited By (5)

X-ray back-diffraction: can we further increase the energy resolution by tuning the energy slightly below that of exact backscattering? journal October 2019
Confusion over the description of the quartz structure yet again journal April 2018
Correct interpretation of diffraction properties of quartz crystals for X-ray optics applications. Corrigendum journal April 2018
On evaluating x-ray imaging crystals with synchrotron radiation journal October 2018
Modeling of energy-dispersive X-ray diffraction for high-symmetry crystal orientation journal January 2019

Figures / Tables (8)


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