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
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/135763
Ver los metadatos del registro completo
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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 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/135763 |
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eng |
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eng |
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