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Raman spectrum of U 4 O 9 : a new interpretation of damage lines in UO 2
Author(s) -
Desgranges L.,
Baldinozzi G.,
Simon P.,
Guimbretière G.,
Canizares A.
Publication year - 2012
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.3054
Subject(s) - raman spectroscopy , superstructure , uranium , analytical chemistry (journal) , homogeneous , allotropy , chemistry , g band , materials science , crystallography , phase (matter) , phase diagram , physics , optics , thermodynamics , metallurgy , chromatography , organic chemistry
Characterisation of uranium oxides in different conditions is a challenge both in nuclear and environment sciences. We focus here on U 4 O 9 , which is a superstructure of UO 2 . Homogeneous U 4 O 9 powder was fabricated and characterised by Raman spectroscopy. The Raman spectrum of a pure‐phase U 4 O 9 is, for the first time, completely described and interpreted. U 4 O 9 Raman spectrum derives from the well characterised one of UO 2 . Besides reminiscent modes of UO 2 , a band at 630 cm ‐1 , which has a specific response to polarised light, was interpreted as characteristic of clusters of interstitial oxygen atoms. These experimental data will help to rationalise the interpretation of UO 2 damaged samples. Copyright © 2011 John Wiley & Sons, Ltd.