Spectroscopic and thermal contribution to the structural characterization of vandenbrandeite

The vibrational (IR and Raman) spectrum of Vandenbrandeite, Cu[UO₂(OH)₄], has been recorded and discussed on the basis of structural considerations through the use of empirical expressions. As the H-bonding in the lattice is poorly known, the characteristics of this bond has been analyzed with the a...

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Autores principales: Botto, Irma Lía, Barone, Vicente Luis, Sanchez, M. A.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2002
Materias:
Química
Oxide
Polymer
Spectroscopy
Microscopy
Electron Microscopy
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/135763
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-135763
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Oxide
Polymer
Spectroscopy
Microscopy
Electron Microscopy
spellingShingle Química
Oxide
Polymer
Spectroscopy
Microscopy
Electron Microscopy
Botto, Irma Lía
Barone, Vicente Luis
Sanchez, M. A.
Spectroscopic and thermal contribution to the structural characterization of vandenbrandeite
topic_facet Química
Oxide
Polymer
Spectroscopy
Microscopy
Electron Microscopy
description The vibrational (IR and Raman) spectrum of Vandenbrandeite, Cu[UO₂(OH)₄], has been recorded and discussed on the basis of structural considerations through the use of empirical expressions. As the H-bonding in the lattice is poorly known, the characteristics of this bond has been analyzed with the aid of H/D isotope exchange, thermal assays and electron microscopy. Samples are practically amorphous to XRD up to ∼700°C whereas crystals morphologically different by SEM microscopy and well characterized by XRD technique are observed from ∼800°C. Vibrational spectroscopy reveals that the atomic arrangement in the structure remains largely unaffected as the dehydration proceeds, suggesting a topochemically controlled process. EPR spectroscopy suggests a disordered distribution of Cu(II) ions as temperature increases. Finally, thermal dehydroxylation and paragenesis of the copper-uranyl oxide hydrate are correlated.
format Articulo
Articulo
author Botto, Irma Lía
Barone, Vicente Luis
Sanchez, M. A.
author_facet Botto, Irma Lía
Barone, Vicente Luis
Sanchez, M. A.
author_sort Botto, Irma Lía
title Spectroscopic and thermal contribution to the structural characterization of vandenbrandeite
title_short Spectroscopic and thermal contribution to the structural characterization of vandenbrandeite
title_full Spectroscopic and thermal contribution to the structural characterization of vandenbrandeite
title_fullStr Spectroscopic and thermal contribution to the structural characterization of vandenbrandeite
title_full_unstemmed Spectroscopic and thermal contribution to the structural characterization of vandenbrandeite
title_sort spectroscopic and thermal contribution to the structural characterization of vandenbrandeite
publishDate 2002
url http://sedici.unlp.edu.ar/handle/10915/135763
work_keys_str_mv AT bottoirmalia spectroscopicandthermalcontributiontothestructuralcharacterizationofvandenbrandeite
AT baronevicenteluis spectroscopicandthermalcontributiontothestructuralcharacterizationofvandenbrandeite
AT sanchezma spectroscopicandthermalcontributiontothestructuralcharacterizationofvandenbrandeite
bdutipo_str Repositorios
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