Extended and local structural characterization of a natural and 800 °C fired Na-montmorillonite–Patagonian bentonite by XRD and Al/Si XANES

Autores
Andrini, Leandro Rubén; Moreira Toja, Ramiro Julián; Gauna, Matías Roberto; Conconi, María Susana; Requejo, Félix Gregorio; Rendtorff Birrer, Nicolás Maximiliano
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A structural characterization of a Patagonian bentonite and its corresponding heating product (800 °C) was carried out. The nature of aluminum and silicon atoms was investigated using Al and Si K-XANES spectroscopy and compared with other well-known Al and/or Si containing materials. The studied material comes from Lago Pellegrini area-Rio Negro Province, Argentina. The main crystalline phase was confirmed to be a Na-montmorillonite. The thermal behavior was studied by DTA-TG-DTG and XRD. A Rietveld based quantification was performed as complementary study. About 90% Na-montmorillonite (clay mineral of smectite Group) content was confirmed and different impurities (quartz, gypsum and feldspars) were also quantified. The smectitic interlayer thermal displacement was determined between 15.49 and 9.81 Å. The XANES results allowed obtaining the AlIV/AlVI ratio and the local symmetry and distortions at Si and Al-sites. The tetra-coordination of silicon and the aluminumtetra and hexa-coordinatedwas found in both materials. The expected high AlIV/AlVI ratio was confirmed and pondered for the thermally treated bentonite.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Centro de Tecnología de Recursos Minerales y Cerámica
Materia
Química
Bentonite
Montmorillonite
Fired bentonite
Structure
XANES
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:10915/117232
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/117232
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Extended and local structural characterization of a natural and 800 °C fired Na-montmorillonite–Patagonian bentonite by XRD and Al/Si XANESAndrini, Leandro RubénMoreira Toja, Ramiro JuliánGauna, Matías RobertoConconi, María SusanaRequejo, Félix GregorioRendtorff Birrer, Nicolás MaximilianoQuímicaBentoniteMontmorilloniteFired bentoniteStructureXANESA structural characterization of a Patagonian bentonite and its corresponding heating product (800 °C) was carried out. The nature of aluminum and silicon atoms was investigated using Al and Si K-XANES spectroscopy and compared with other well-known Al and/or Si containing materials. The studied material comes from Lago Pellegrini area-Rio Negro Province, Argentina. The main crystalline phase was confirmed to be a Na-montmorillonite. The thermal behavior was studied by DTA-TG-DTG and XRD. A Rietveld based quantification was performed as complementary study. About 90% Na-montmorillonite (clay mineral of smectite Group) content was confirmed and different impurities (quartz, gypsum and feldspars) were also quantified. The smectitic interlayer thermal displacement was determined between 15.49 and 9.81 Å. The XANES results allowed obtaining the AlIV/AlVI ratio and the local symmetry and distortions at Si and Al-sites. The tetra-coordination of silicon and the aluminumtetra and hexa-coordinatedwas found in both materials. The expected high AlIV/AlVI ratio was confirmed and pondered for the thermally treated bentonite.Instituto de Investigaciones Fisicoquímicas Teóricas y AplicadasCentro de Tecnología de Recursos Minerales y Cerámica2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf233-240http://sedici.unlp.edu.ar/handle/10915/117232enginfo:eu-repo/semantics/altIdentifier/issn/0169-1317info:eu-repo/semantics/altIdentifier/doi/10.1016/j.clay.2016.12.030info: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:UNLP2025-09-29T11:27:34Zoai:sedici.unlp.edu.ar:10915/117232Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:27:35.051SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Extended and local structural characterization of a natural and 800 °C fired Na-montmorillonite–Patagonian bentonite by XRD and Al/Si XANES
title Extended and local structural characterization of a natural and 800 °C fired Na-montmorillonite–Patagonian bentonite by XRD and Al/Si XANES
spellingShingle Extended and local structural characterization of a natural and 800 °C fired Na-montmorillonite–Patagonian bentonite by XRD and Al/Si XANES
Andrini, Leandro Rubén
Química
Bentonite
Montmorillonite
Fired bentonite
Structure
XANES
title_short Extended and local structural characterization of a natural and 800 °C fired Na-montmorillonite–Patagonian bentonite by XRD and Al/Si XANES
title_full Extended and local structural characterization of a natural and 800 °C fired Na-montmorillonite–Patagonian bentonite by XRD and Al/Si XANES
title_fullStr Extended and local structural characterization of a natural and 800 °C fired Na-montmorillonite–Patagonian bentonite by XRD and Al/Si XANES
title_full_unstemmed Extended and local structural characterization of a natural and 800 °C fired Na-montmorillonite–Patagonian bentonite by XRD and Al/Si XANES
title_sort Extended and local structural characterization of a natural and 800 °C fired Na-montmorillonite–Patagonian bentonite by XRD and Al/Si XANES
dc.creator.none.fl_str_mv Andrini, Leandro Rubén
Moreira Toja, Ramiro Julián
Gauna, Matías Roberto
Conconi, María Susana
Requejo, Félix Gregorio
Rendtorff Birrer, Nicolás Maximiliano
author Andrini, Leandro Rubén
author_facet Andrini, Leandro Rubén
Moreira Toja, Ramiro Julián
Gauna, Matías Roberto
Conconi, María Susana
Requejo, Félix Gregorio
Rendtorff Birrer, Nicolás Maximiliano
author_role author
author2 Moreira Toja, Ramiro Julián
Gauna, Matías Roberto
Conconi, María Susana
Requejo, Félix Gregorio
Rendtorff Birrer, Nicolás Maximiliano
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Química
Bentonite
Montmorillonite
Fired bentonite
Structure
XANES
topic Química
Bentonite
Montmorillonite
Fired bentonite
Structure
XANES
dc.description.none.fl_txt_mv A structural characterization of a Patagonian bentonite and its corresponding heating product (800 °C) was carried out. The nature of aluminum and silicon atoms was investigated using Al and Si K-XANES spectroscopy and compared with other well-known Al and/or Si containing materials. The studied material comes from Lago Pellegrini area-Rio Negro Province, Argentina. The main crystalline phase was confirmed to be a Na-montmorillonite. The thermal behavior was studied by DTA-TG-DTG and XRD. A Rietveld based quantification was performed as complementary study. About 90% Na-montmorillonite (clay mineral of smectite Group) content was confirmed and different impurities (quartz, gypsum and feldspars) were also quantified. The smectitic interlayer thermal displacement was determined between 15.49 and 9.81 Å. The XANES results allowed obtaining the AlIV/AlVI ratio and the local symmetry and distortions at Si and Al-sites. The tetra-coordination of silicon and the aluminumtetra and hexa-coordinatedwas found in both materials. The expected high AlIV/AlVI ratio was confirmed and pondered for the thermally treated bentonite.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Centro de Tecnología de Recursos Minerales y Cerámica
description A structural characterization of a Patagonian bentonite and its corresponding heating product (800 °C) was carried out. The nature of aluminum and silicon atoms was investigated using Al and Si K-XANES spectroscopy and compared with other well-known Al and/or Si containing materials. The studied material comes from Lago Pellegrini area-Rio Negro Province, Argentina. The main crystalline phase was confirmed to be a Na-montmorillonite. The thermal behavior was studied by DTA-TG-DTG and XRD. A Rietveld based quantification was performed as complementary study. About 90% Na-montmorillonite (clay mineral of smectite Group) content was confirmed and different impurities (quartz, gypsum and feldspars) were also quantified. The smectitic interlayer thermal displacement was determined between 15.49 and 9.81 Å. The XANES results allowed obtaining the AlIV/AlVI ratio and the local symmetry and distortions at Si and Al-sites. The tetra-coordination of silicon and the aluminumtetra and hexa-coordinatedwas found in both materials. The expected high AlIV/AlVI ratio was confirmed and pondered for the thermally treated bentonite.
publishDate 2017
dc.date.none.fl_str_mv 2017
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/10915/117232
url http://sedici.unlp.edu.ar/handle/10915/117232
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0169-1317
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.clay.2016.12.030
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
233-240
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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