Dear rietvelders I would like to consult with you as for the possibility to determine small shift in d-space in the order of 0.1pm in normal Bruker x-ray diffractometer with Bragg Brentano geometry<https://www.google.co.il/search?q=bragg+brentano+geometry&biw=1280&bih=698&tbm=isch&tbo=u&source=univ&sa=X&ei=vwnMUo-BCo2IyQPlp4GgBg&sqi=2&ved=0CCoQsAQ>.
. *Detector:* Our diffractometer equipped with *multi-channel Laynex detector*. I used solar slit and 0.6mm advancing slit. *Source:* Cu Kalpha1, Kalpha2. *Experiment:* Step size 0.02o Time per each step 0.3sec I used internal standard that has reflection peak at 2teta = 12.71o I repeat the diffraction experiments 3 times. Care has been taken not to move the sample between diffraction experiments. *Analysis:* All three diffraction experiments merged, baseline has been subtracted from the merged data set. Position of the peak has been determined by fitting to the best peak equation using Fityk. Shift in d-space has been determine with respect to the internal standard peak reflection. Parallel reflections gave similar shifts in the order of 0.1pm with relative standard deviation of 8.65%. Dose my result make sense? Do I violate the limit of resolution? Please comment. Thank you from advance Shay -- _________________________________________________ Dr. Shay Tirosh Institute for Nanotechnology & Advanced Materials Bar Ilan University Ramat Gan, 52900 Israel Phone: +972-(0)30-531-7320 Mobile: +972-(0)54-8834533 Email: stiro...@gmail.com _________________________________________________
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