Dear François,
Maybe you have a strongly disordered system. Depending on the type of disorder 
and the distribution of diffuse intensity, it can also have an influence on the 
reflection profile (thermal diffuse scattering).
Michael


Dr. Michael Wörle
Head Small Molecule Crystallography Center
Laboratorium für Anorganische Chemie
ETH Zürich
HCI H103
Vladimir-Prelog-Weg 1
CH-8093 Zürich

Tel.:   +41 44 632 5684
FAX:  +41 44 632 1149
email: woe...@inorg.chem.ethz.ch
http://www.smocc.ethz.ch


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-----Ursprüngliche Nachricht-----
Von: rietveld_l-requ...@ill.fr [mailto:rietveld_l-requ...@ill.fr] Im Auftrag 
von François Goutenoire
Gesendet: Wednesday, 3 March 2021 13:34
An: rietveld_l@ill.fr
Betreff: Hyper-Lorentzian effect on quantitative analysis

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

--
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Pr. Francois GOUTENOIRE
e-mail: francois.gouteno...@univ-lemans.fr
Tel: 02.43.83.33.54
FAX: 02.43.83.35.06
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Département des Oxydes et Fluorures
Institut des Molécules et des Matériaux du Mans IMMM - UMR CNRS 6283 Université 
du Maine - Avenue Olivier Messiaen
F-72085 Le Mans Cedex 9
FRANCE
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https://cnrsformation.cnrs.fr/diffraction-des-rayons-x-sur-materiaux-polycristallins?axe=135
Formation EDX CNRS 2020
https://cnrsformation.cnrs.fr/fluorescence-x-edx?axe=135
Formation SAXS et Réflectivités pour couches minces et matériaux nanostructurés.
https://cnrsformation.cnrs.fr/caracterisation-des-materiaux-nanostructures-par-diffusion-des-rayons-x?axe=135
Bibliographie
https://scholar.google.fr/citations?hl=fr&user=qC-lmN4AAAAJ&view_op=list_works&authuser=1&sortby=title
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