Abstract
An analytical solution was obtained for the average contrast factor C{sub hkl} of dislocations with (100) slip-system in anisotropic cubic crystals. The expression provides the dislocation contrast factor as an explicit function of the Miller indices (hkl), the elastic anisotropy factor A{sub z}, and the Poisson ratio {nu}, thus avoiding lengthy numerical calculations or approximate parametrizations. The expression was incorporated in the whole powder pattern modelling algorithm and used to study dislocations in ball milled nanocrystalline Cu{sub 2}O.
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