Re: quantitative analysis - perovskites - preferred orientation

2014-02-06 Thread Leonid Solovyov
Dear Lukasz, First of all, in the majority of Rietveld programs the uniaxial preferred orientation (such as [100]) can not be handled adequately for cubic systems since the programs normally generate only one symmetrically equivalent hkl for a diffraction peak. In DDM, for such cases, I include

quantitative analysis - perovskites - preferred orientation

2014-02-06 Thread Ɓukasz Kruszewski
Dear Madam/Sir(s), I am performing Rietveld analysis for a sample containing perovskites (CaTiO3 and SrTiO3). When putting-in a preferred orientation (PO) correction (100 direction, as the crystals are cubic-like), I obtain better Rwp and GOF i.e. chi-squared values (9.63 and 1.5, respectively) th