preferred orientation

[Jo�o Batista Santos Barbosa]

Hi everybody !

 I have had some problems to set the correct preferred orientation
direction.I have tried  to  get the axis zone direction from the peaks
that I suppose are raised and so  supply  this direction  to Fullprof as
pr1,pr2 and pr3, but this is not working well.Then, my question is : how
can I get the preferred orientation direction (pr1,pr2,pr3)from  an
X-ray pattern expressed in reciprocal space?
 Thanks .