RE: Quantitative analysis

[Martin]

Dear Mario, My experience of quant Rietveld is much the same as yours - poor 
quant result if using any sort of PO function. Advise as others have here - 
reduce PO. Capillary geometry may help in many instances but in this case could 
then have problems with absorption seeing as you will most likely be having to 
use Co radiation to avoid fluorescence from the iron. Good luck, Martin
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