This example shows the common case of both primary and secondary soller slits collimator. We reached a Rwp value of 1 per cent better than the best result. The program was developed after the Rietveld Round Robin has finished. Therefore this result is not published.
Polymers commonly show reflections at very low angles.
Therefore, primary and secondary soller slits are both in use. The detector is a semiconductor one for Kbeta separation. This was a measuring at an 3000TT diffractometer in transmission. The thickness of the specimen was estimated to 0.2mm. And there is a strong lowering of intensity for larger 2 theta angles.