I have done Rietveld refinement on PXRD but i do not know where to find the information of Final R indices[I>2sigma(I)] , R indicies (all data) , Extinction coefficient, Largest diff. peak and hole.
Actually, it depends on the software you have used for the Rietveld refinement. As a JANA2006 user, I would try to export a CIF file and open it with any text editor (e.g., Notepad) afterwards. Such information is usually automatically written into the CIF file. If not, you may try to read the log files for the refinement procedure (for instance, in JANA2006, full details on the refinement procedure are given in the respective *.ref file)