Dear Rajesh,
If you mean something like LaMnO3+d, the formula should be re-written
La1-dMn1-dO3 since the normal perovskite accepts no interstitial oxygen.
In other cases such as La2CuO4+d the layered strucure allows for
insterstitial oxygen in the LaO layer therefore the formula is correct.
Diff
doesn't support the variables they are
refining.
jools
From: rietveld_l-requ...@ill.fr [rietveld_l-requ...@ill.fr] on behalf of rajesh
thattarathody [rajeshbath...@gmail.com]
Sent: 09 June 2014 11:51
To: rietveld_l@ill.fr
Subject: Regarding Oxygen occupancy
Dear Rietvelders,
I have seen some papers of perovskites reporting oxygen occupancy greater
than one by Rietveld refinement. Can oxygen occupancy be greater than one ?
Could you please explain its physical meaning ?
Thanking you in advance.
Rajesh T
Research scholar
CSIR-National Chemical Labor
