> my question is : how can I get the preferred orientation direction
> (pr1,pr2,pr3) from an X-ray pattern expressed in reciprocal space?
You may try to analyse the shape of the (0,0,0) peak on the Patterson
map. In the case of a preferred orientation it usually elongates in the
directions perpendicular to the reflecting planes of the weakened
reflections. The indexes of the plane which is perpendicular to the
direction of the maximal or minimal size of the (0,0,0) peak can be
chosen as the (pr1,pr2,pr3) parameters.
I customarily use this trick and have satisfactory results.
Best regards,
Leonid Solovyov
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