Morphological measurements anisotropic patterns

In general, structure solution from powder XRD data has a good chance of success only if the experimental powder XRD pattern contains reliable information on the intrinsic relative intensities of the diffraction maxima, which requires that there is no preferred orientation in the powder sample. Preferred orientation arises when the crystallites in the powder sample have a nonrandom distribution of orientations, and this effect can be particularly severe when the crystal morphology is strongly anisotropic (e.g. long needles or flat plates). When a powder sample exhibits preferred orientation, the measured relative peak intensities differ from the intrinsic relative diffraction intensities, limiting the prospects for determining reliable structural information from the powder XRD pattern. In order to circumvent this... 

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