In the Iron phosphate Mossbauer spectra, two distinct sites for Fe2+ and Fe3+ can be observed but in the paper "Mössbauer spectroscopy study
of 60P2O5-40Fe2O3 glass" (http://www.ichtj.waw.pl/nukleonika/www/back/full/vol58_2013/v58n1p063f.pdf) the Fe3+ component has been fitted with two spectra assigning for tetrahedral and octahedral. Can anybody working on these glasses help me understanding regarding the assignment of the sites in this paper?
Did you try KXSW or XANES measurments?
Ref. to Journal of Physical Chemistry C 116, (2012) 665-670 and Journal of Physical Chemistry C 115, 15 (2011) 7411-7418
No, i have not done it yet. But I am not able to get convinced with the assignment of the sites. The spectrum matches with the paper mentioned above and "Journal of Non-Crystalline Solids 222 (1997) 144-152 - (spectrum A)". How do we explain the fitting anomaly in the mentioned two papers.
There is a wealth of publications on the 60-40 iron phosphate glasses. I suggest you read papers from my group in the UK; Delbert Day's group in the USA; and others. If, after doing this, you still have questions, please re-post on here and I will try to give you more guidance. But first, I strongly advise immersing yourself in the relevant leterature. Kind Regards, Paul BIngham.
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