You can run into “interesting” behavior with metastable phases. I once ran a sample that gradually transformed from the “high temperature” structure to the “low temperature” under x-ray illumination. The two phases were red and yellow, so it was very obvious where the x-ray beam had illuminated the powder.
Andrew ***************************************************** Dr. E. Andrew Payzant Engineering Materials Group Leader Chemical and Engineering Materials Division Neutron Sciences Directorate Oak Ridge National Laboratory 1 Bethel Valley Road Bldg. 8600, Room B-438, Mailstop 6475 Oak Ridge, TN 37831-6475 USA Phone: (865) 576-2164 cell: (865) 235-4981 email: payza...@ornl.gov http:/neutrons.ornl.gov/cemd/<http://neutrons.ornl.gov/cemd/> http://www.researcherid.com/rid/B-5449-2009 http://orcid.org/0000-0002-3447-2060 ****************************************************** From: <rietveld_l-requ...@ill.fr> on behalf of Edward Laitila <ealai...@mtu.edu> Reply-To: Edward Laitila <ealai...@mtu.edu> Date: Monday, May 22, 2017 at 8:19 AM To: Shay Tirosh <stiro...@gmail.com> Cc: Rietveld list <rietveld_l@ill.fr> Subject: Re: Sample damaging during XRD There should be no damage but you may see a slit change in color where the beam hits the sample, a temporary change in the color center. I suggest running your generator at 45 kV and 35 mA you will get more intensity. Cheers, Ed On Sun, May 21, 2017 at 12:21 PM, Shay Tirosh <stiro...@gmail.com<mailto:stiro...@gmail.com>> wrote: Dear Rietveldrs Do you know any damaging to sample that may happen during long scanning time say (3h). Specifically in case the x-ray source is Cu with Ka1+Ka2 that operates under 40mA and 40kV and the sample is metal oxides Please suggest on ref or book that elaborate on this topic. Thanks 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<tel:+972%2054-883-4533> Email: stiro...@gmail.com<mailto:stiro...@gmail.com> _________________________________________________ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Please do NOT attach files to the whole list <alan.he...@neutronoptics.com> Send commands to <lists...@ill.fr<mailto:lists...@ill.fr>> eg: HELP as the subject with no body text The Rietveld_L list archive is on http://www.mail-archive.com/rietveld_l@ill.fr/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ -- Dr. Edward A. Laitila Senior Research Engineer/Scientist II/Adjunct Assistant Professor Michigan Technological University Dept. of MSE Room 628 M&M Building (906) 369-2041
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Please do NOT attach files to the whole list <alan.he...@neutronoptics.com> Send commands to <lists...@ill.fr> eg: HELP as the subject with no body text The Rietveld_L list archive is on http://www.mail-archive.com/rietveld_l@ill.fr/ ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++