Some tricks and hints for using Alan Larson and Bob von Dreele's GSAS and Brian Toby's EXPGUI for Rietveld crystal structure refinement of minerals and polymeric inorganics from powder diffraction data.
CCP14 (Collaborative Computation Project No 14 for
Single Crystal and Powder Diffraction)
Department of Crystallography;
Birkbeck College, University of London,
Malet Street, Bloomsbury, London, WC1E 7HX, UK.