ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
The analysis of the full-width at half-maximum (FWHM) of X-ray diffraction profiles measured with monochromatic synchrotron radiation enables the evaluation of the mosaic spread of the sample. This method presupposes the high collimation of synchrotron radiation (FWHM ̃20” of arc). As an example the results from a CaF2 crystal sphere (90 μm diameter) are presented. The reflections strongly affected by extinction show a significantly greater FWHM, thereby indicating at once the need for an extinction correction. A mosaic spread of 75(3)” of arc was determined from the FWHM of all reflections recorded in the step-scan mode, which was used to correct the secondary extinction and to estimate the radius R of the mosaic blocks [R = 4 (1) μm].
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0108767386099798
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