Electronic Resource
Chester
:
International Union of Crystallography (IUCr)
Journal of synchrotron radiation
4 (1997), S. 95-101
ISSN:
1600-5775
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Geosciences
,
Physics
Notes:
Advantage was taken of the highly focused X-ray beam (10–30 μm) and the broad white spectrum of synchrotron X-rays at the ESRF for automatic recording of Laue patterns from polycrystals and extraction of orientation information. The procedure used is similar to that applied for electron-backscattering patterns in the scanning electron microscope and provides data for local orientation mapping used in texture analysis. Laue patterns are obtained from a thin slice of material in transmission and recorded with a CCD detector. The Laue geometry is converted into a gnomonic projection in which co-zonal reflections lie on straight lines. On applying the Hough transform these lines are merged into a single point, which is recognized by the computer and assigned zone indices [uvw] by comparison with a table of interzonal angles. From the angular positions of several [uvw] the crystal orientation is calculated. The method is illustrated for the orthorhombic magnesium silicate olivine.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S090904959601432X
Permalink
Library |
Location |
Call Number |
Volume/Issue/Year |
Availability |