Presentation Goal Show how to set up and perform a Rietveld refinement with GSAS using the EXPGUI graphical user interface. Tutorial Outline Introduction Create a GSAS Experiment File Adding a phase Specifying Powder Diffraction Data (Adding a Histogram) Changing the Background Function Initial Fitting: Refine Scale Factor and Background Plotting the Initial Fit Fitting the Unit Cell Fitting the Diffractometer Zero Correction Initial Fitting of Profile Parameters Group Uiso parameters & Refine coordinates and Overall Uiso Finishing Up Links Tutorial web pages Tutorial as a 32 page .pdf document APS Powder diffraction crystallography instructional materials overview
