Hi, I have recently switched to the new GSAS which let me use the CW#4 profile function. I can achieve better profile handling with CW#4 than the CW#2. My problem is: After refine the dummy atom(H) in LeiBail mode for the profile parameter, I put in real atom positions for the rietveld refinement, but the Rfsq could not be refined. Even though I can refine the Rwp below 5% in one of my work, the refined Rfsq staying at 90%! Am I doing something wrong? Thanks in advanced. Xiang Ouyang Department of Chemistry Texas A&M University
