I've heard from others at Northwestern University using Reitveld that
thermal parameters cannot be reliably refined from x-ray powder
diffraction data (XRPD). There are several published reports containing
thermal parameters obtained using single crystal x-ray diffraction,
diffuse x-ray scattering, and neutron powder diffraction on the material
I'm working with (Beta" alumina).
Why does x-ray powder diffraction fail? Why do the others work?
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Matthew Henrichsen
Department of Materials Science and Engineering
Northwestern University, Evanston IL USA
