with some materials, I observed powder diffraction patterns (Bragg-Brentano, 
X'pert) which
show a broad negative peak around 5-6Âș(2th), instead of the smoothly descending 
intensity
coming from the primary beam.

Did some of you observe the same phenomenon, and has this been dealt with 
anywhere?

best regards

Miguel

--
Miguel Gregorkiewitz
Dip Scienze della Terra, UniversitĂ 
via Laterina 8, I-53100 Siena, Europe
fon +39'0577'233810 fax 233938
email [email protected]


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