Spectroscopic and thermal contribution to the structural characterization of vandenbrandeite

Autores
Botto, Irma Lía; Barone, Vicente Luis; Sanchez, M. A.
Año de publicación
2002
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Centro de Química Inorgánica
Materia
Química
Oxide
Polymer
Spectroscopy
Microscopy
Electron Microscopy
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/135763
Acceder
id SEDICI_5ee5a291825f289d383419891d51e817
oai_identifier_str oai:sedici.unlp.edu.ar:10915/135763
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Spectroscopic and thermal contribution to the structural characterization of vandenbrandeiteBotto, Irma LíaBarone, Vicente LuisSanchez, M. A.QuímicaOxidePolymerSpectroscopyMicroscopyElectron MicroscopyThe 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.Centro de Química Inorgánica2002-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf177-183http://sedici.unlp.edu.ar/handle/10915/135763enginfo:eu-repo/semantics/altIdentifier/issn/0022-2461info:eu-repo/semantics/altIdentifier/issn/1573-4803info:eu-repo/semantics/altIdentifier/doi/10.1023/a:1013182917829info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T17:12:52Zoai:sedici.unlp.edu.ar:10915/135763Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:12:52.638SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Spectroscopic and thermal contribution to the structural characterization of vandenbrandeite
title Spectroscopic and thermal contribution to the structural characterization of vandenbrandeite
spellingShingle Spectroscopic and thermal contribution to the structural characterization of vandenbrandeite
Botto, Irma Lía
Química
Oxide
Polymer
Spectroscopy
Microscopy
Electron Microscopy
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
dc.creator.none.fl_str_mv Botto, Irma Lía
Barone, Vicente Luis
Sanchez, M. A.
author Botto, Irma Lía
author_facet Botto, Irma Lía
Barone, Vicente Luis
Sanchez, M. A.
author_role author
author2 Barone, Vicente Luis
Sanchez, M. A.
author2_role author
author
dc.subject.none.fl_str_mv Química
Oxide
Polymer
Spectroscopy
Microscopy
Electron Microscopy
topic Química
Oxide
Polymer
Spectroscopy
Microscopy
Electron Microscopy
dc.description.none.fl_txt_mv 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.
Centro de Química Inorgánica
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.
publishDate 2002
dc.date.none.fl_str_mv 2002-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/135763
url http://sedici.unlp.edu.ar/handle/10915/135763
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0022-2461
info:eu-repo/semantics/altIdentifier/issn/1573-4803
info:eu-repo/semantics/altIdentifier/doi/10.1023/a:1013182917829
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
177-183
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 12.982451

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