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

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 mat...

Descripción completa

Detalles Bibliográficos
Autores principales: Andrini, Leandro Rubén, Moreira Toja, Ramiro Julián, Gauna, Matías Roberto, Conconi, María Susana, Requejo, Félix Gregorio, Rendtorff Birrer, Nicolás Maximiliano
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Química
Bentonite
Montmorillonite
Fired bentonite
Structure
XANES
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/117232
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-117232
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Bentonite
Montmorillonite
Fired bentonite
Structure
XANES
spellingShingle Química
Bentonite
Montmorillonite
Fired bentonite
Structure
XANES
Andrini, Leandro Rubén
Moreira Toja, Ramiro Julián
Gauna, Matías Roberto
Conconi, María Susana
Requejo, Félix Gregorio
Rendtorff Birrer, Nicolás Maximiliano
Extended and local structural characterization of a natural and 800 °C fired Na-montmorillonite–Patagonian bentonite by XRD and Al/Si XANES
topic_facet Química
Bentonite
Montmorillonite
Fired bentonite
Structure
XANES
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.
format Articulo
Articulo
author Andrini, Leandro Rubén
Moreira Toja, Ramiro Julián
Gauna, Matías Roberto
Conconi, María Susana
Requejo, Félix Gregorio
Rendtorff Birrer, Nicolás Maximiliano
author_facet Andrini, Leandro Rubén
Moreira Toja, Ramiro Julián
Gauna, Matías Roberto
Conconi, María Susana
Requejo, Félix Gregorio
Rendtorff Birrer, Nicolás Maximiliano
author_sort Andrini, Leandro Rubén
title Extended and local structural characterization of a natural and 800 °C fired Na-montmorillonite–Patagonian bentonite by XRD and Al/Si 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
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/117232
work_keys_str_mv AT andrinileandroruben extendedandlocalstructuralcharacterizationofanaturaland800cfirednamontmorillonitepatagonianbentonitebyxrdandalsixanes
AT moreiratojaramirojulian extendedandlocalstructuralcharacterizationofanaturaland800cfirednamontmorillonitepatagonianbentonitebyxrdandalsixanes
AT gaunamatiasroberto extendedandlocalstructuralcharacterizationofanaturaland800cfirednamontmorillonitepatagonianbentonitebyxrdandalsixanes
AT conconimariasusana extendedandlocalstructuralcharacterizationofanaturaland800cfirednamontmorillonitepatagonianbentonitebyxrdandalsixanes
AT requejofelixgregorio extendedandlocalstructuralcharacterizationofanaturaland800cfirednamontmorillonitepatagonianbentonitebyxrdandalsixanes
AT rendtorffbirrernicolasmaximiliano extendedandlocalstructuralcharacterizationofanaturaland800cfirednamontmorillonitepatagonianbentonitebyxrdandalsixanes
bdutipo_str Repositorios
_version_ 1764820447088607234

Ejemplares similares