Dear all,
I would like to ask you about your experience in collecting the XRD data from low angles (for me from 2° of 2Theta) to 50° 2Theta using the Bruker D8 Advance diffractometer (Bragg-Brentano geometry) with the Lynx Eye XE position sensitive detector. The studied samples are clay minerals and the main purpose of the task is qualitative and later (semi)quantitative phase analysis. I have fixed beam knife (=Anti-Scatter Screen) and ADS/FDS slits, 280 mm is the goniometer radius. The length of my samples is around 15 mm. After a few experiments and calculation, the optimal data collection strategy seems to be: - 10 mm automatic divergence slits (ADS), beam knife 2.5 mm above the sample (beam knife at this position does not interfere with the primary beam (to 50°) and still reduces the background at low angles). I have tried the 0.26 and 0.14° FDS, however a large “beam overflow” has occurred. Moreover, the intensities of diffractions at higher angles are very low in comparison to the data collected with ADS slits. Any suggestions are welcome. Frantisek Laufek Czech Geological Survey Prague Czech Republic
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