I will be offering a workshop on crystal structure determination from X-ray powder diffraction (laboratory and synchrotron) using free-distribution software such as EXPO2014 and winPSSP, on November 5-6, 2022 (Saturday and Sunday), at Old Dominion University. Rietveld analysis using GSAS and GSAS-II will be briefly discussed.  Website: https://sites.wp.odu.edu/sdpd/ . Registration (by zoom) is free.