Powder dictionary (pdCIF) version 1.0.1
This section is used to define parameters relevant to a least-squares fit to a powder diffractogram, using a Rietveld or other full-profile (e.g. Pawley or Le Bail methods) fit. Note that values in this section refer to full-pattern fitting. Use the appropriate items for single-crystal analyses from the core CIF dictionary for structure refinements using diffraction intensities estimated from a powder diffractogram by pattern-decomposition methods. Also note that many entries in the core _refine_ls_ entries may also be useful (for example _refine_ls_shift/su_*).