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The effect of metamictization on the Raman spectroscopy of the uranyl titanate mineral davidite (La,Ce)(Y,U,Fe2+)(Ti,Fe3+)20(O,OH)38

Frost, Ray L. & Reddy, B. Jagannadha (2011) The effect of metamictization on the Raman spectroscopy of the uranyl titanate mineral davidite (La,Ce)(Y,U,Fe2+)(Ti,Fe3+)20(O,OH)38. Radiation Effects and Defects in Solids, 166, pp. 133-136.

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Abstract

Raman spectra of the uranyl titanate mineral davidite-(La) (La,Ce)(Y,U,Fe2+)(Ti,Fe3+)20(O,OH)38 were analysed and related to the mineral structure. Observed bands are attributed to the TiO and (UO2)2+ stretching and bending vibrations, U-OH bending vibrations, H2O and (OH)- stretching, bending and libration modes. U-O bond lengths in uranyls and O-H…O bond lengths are calculated from the wavenumbers assigned to the stretching vibrations. Raman bands of davidite-(La) are in harmony with those of the uranyl oxyhydroxides. The mineral davidite-(La) is metamict as is evidenced by the intensity of the UO stretching and bending modes being of lower intensity than expected and with bands that are significantly broader.

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ID Code: 39166
Item Type: Journal Article
Keywords: Davisite-(La), Metamictization, holfertite, brannerite, uranyl, titanium, mineral, metamict , Raman spectroscopy, U-O bond length
DOI: 10.1080/10420150.2010.516394
ISSN: 1042-0150
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > Schools > Chemistry
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2011 Taylor Francis
Copyright Statement: This is an electronic version of an article published in the journal Radiation Effects and Defects in Solids, which is available online at informaworldTM
Deposited On: 14 Dec 2010 11:14
Last Modified: 29 Feb 2012 20:28

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