I realise that this is not strictly a Rietveld question but I thought that subcribers to this list may the best audience to answer it. I'm looking for suggestions for softaware that will calculate the reference intensity ratio (RIR) of phases with some flexibility to chose peak areas or heights and to specify collimation, radiation etc. My purpose is that I would like to compare calculated with measured values. Many thanks, -- Stephen Hillier Macaulay Land Use Research Inst. Craigiebuckler ABERDEEN AB15 8QH Tel. +44 (0)1224 318611 Fax. +44 (0)1224 311556