Le 12/9/2017 à 7:49 PM, N. Dragoe a écrit :
Hi
ZnO can also have a darker colour if it is obtained by thermal
treatment in low pressure of oxygen.
In my opinion, if all else is correct -I mean normal Soller slits,
correct height,… etc- there might be sample strain.
Regards
N
Le 9 déc. 2017 à 16:25, Nilesh Kulkarni <nil...@tifr.res.in
<mailto:nil...@tifr.res.in>> a écrit :
yes that is surprising. pellet is black while powder is white. ZnO
pellet should also have been white.
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With Regards,
Nilesh Kulkarni.
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On Sat, Dec 9, 2017 at 1:31 AM, Joachim Breternitz
<joachim.bretern...@helmholtz-berlin.de
<mailto:joachim.bretern...@helmholtz-berlin.de>> wrote:
Hi,
Given the fact that the peaks are shifted between the powder and
the pellet measurement, could it maybe be due to a height error
of the pellet during the measurement?
Best,
Joachim.
Am 8. Dezember 2017 20:48:35 MEZ schrieb Jon Wright
<wri...@esrf.fr <mailto:wri...@esrf.fr>>:
Hello,
In the photo, the pellet is black and the powder is white.
Why is that?
Best
Jon
On December 8, 2017 3:35:20 PM GMT+01:00, "François
Goutenoire" <francois.gouteno...@univ-lemans.fr
<mailto:francois.gouteno...@univ-lemans.fr>> wrote:
Dear Rietveld users,
We observe an unusual asymmetric peak shape on pellet and
not when the sample has been crushed in powder.
This asymmetry is observed even at high 2theta angle. I
would like to known if someone has an explanation ?
I have put the data in the link here after
http://perso.univ-lemans.fr/~fgouten/Asymmetry
<http://perso.univ-lemans.fr/%7Efgouten/Asymmetry>
Best Whishes, François Goutenoire
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Dear All,
2Theta shift is probably due to high adjustment. As all peaks have this
asymmetry profile it could be a contribution of low particle size Zn-O
phase, the white ZnO I think its a commercial one. Try to modify the
sample orientation and beam incidence the asymmetry in this case will
remain present.
regards,
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Dr. Hafedh DRISS
X-Ray and Electron Microscopy Lab
Department of Chemical and Materials Engineering
Faculty of Engineering, King Abdulaziz University
Jeddah, Kingdom of Saudi Arabia
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