ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
A Bernoullian powder sample is defined as an ensemble of parallelepiped crystals where the probability of any layer being on the surface is independent of its size as well as of the number of its predecessors, although being different for the three types of layers parallel to the crystal faces. It is shown that the line profile of any reflection is given by the Lorentzian, or Cauchy, distribution I(ε) = A/(1 + K2ε2), where ε is the reciprocal coordinate measured from the peak with intensity A, and 2/K is the half-peak width, provided the average size of the crystals is at least of the order of 10 unit cells along each of the three edges.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0567739478001394
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