Dear François, only a minor comment, that I don't know if it can be applied to your sample. Years ago (1988), a published paper indicated the possible relation between the super-Lorentzian shape of the peaks and the presence of a bimodal crystallite size distribution. Best regards,
Florentino Sánchez De: "François Goutenoire" <francois.gouteno...@univ-lemans.fr> Para: "rietveld l" <rietveld_l@ill.fr> Enviados: Jueves, 4 de Marzo 2021 10:41:05 Asunto: Re: Hyper-Lorentzian effect on quantitative analysis Dear Rietveld users, Thank you very much for all your responses, it will help us move forward on the subject. Unfortunately, I cannot say more because of an NDA. But it still looks very interesting from a fundamental point of view. Best whishes, françois Goutenoire Le 03/03/2021 à 18:47, Mendenhall, Marcus H. (Fed) a écrit : Is it really amorphous content, or is there a whole bunch of very fine nanocrystalline stuff or material with a very high defect density that is widening the peak? If the fitter is having trouble matching the peak shape, it may be ascribing a fairly arbitrary portion between amorphous and crystalline. Marcus Mendenhall Materials Measurement Science Division National Institute of Science and Technology 100 Bureau Dr. stop 8370 (217/B115) Gaithersburg, MD 20899 USA Phone: +1-301-975-8631 during COVID-19 response period: Home phone: 301-916-5486 Cell: 615-293-3120 BQ_BEGIN On Mar 3, 2021, at 7:34 AM, François Goutenoire [ mailto:francois.gouteno...@univ-lemans.fr | <francois.gouteno...@univ-lemans.fr> ] wrote: Dear Rietveld users, I have some industrial compound presenting a strong hyper-Lorentzian peak shape (eta=1.1 with HighScore). When we calculate the amorphous content after an internal standard addition, the result is 40%. The micro-absorption effect has been minimized (mu of the internal standard is closed to the compound). But with some electronic transmission analysis no amorphous is observed. The question is : Does a strong hyper-Lorentzian peak shape could influence quantitative analysis ? François -- ********************************************************************************************* Pr. 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