Hiya all. A joint introduction and question. I'm a PDF with Canada's National Research Council working on cathode materials for lithium ion batteries (yes we do use neutrons!). My background is in oxides of various types and I have an interest in time resolved diffraction studies. I use GSAS (with ExpGUI) although I am also in the process of learning Rietan. Now for the question. Unfortunately chemical constraints aren't covered in the GSAS manual. How would I go about constraining the overall stoichiometry to a particular value as it doesn't seem very intuitive. Needless to say the material has cation disorder with vacancies to make life interesting. Many thanks! Pamela Whitfield Room 240 Building M12 ICPET National Reserach Council Montreal Road Ottawa ON K1A 0R6 CANADA Tel: (613) 991 2435
