Alteration of trioctahedral micas in the presence of inorganic and organic acids

The alteration of two trioctahedral micas, biotite and phlogopite, was investigated at the meso, micro, and nanoscale using three complementary microscopy techniques to better understand mica surface reactivity. In situ and ex situ experiments were performed to monitor the mineral interface during d...

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Detalles Bibliográficos
Autores: Cappelli, Chiara, Van Driessche, Alexander E. S., Cama, Jordi, Huertas, F. J.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/305840
Acceso en línea:http://hdl.handle.net/10261/305840
https://api.elsevier.com/content/abstract/scopus_id/85150879154
Access Level:acceso abierto
Palabra clave:Phlogopite
AFM
Biotite
Dissolution
Interferometry
Laser confocal microscopy
Mica
Organic acid
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spelling Alteration of trioctahedral micas in the presence of inorganic and organic acidsCappelli, ChiaraVan Driessche, Alexander E. S.Cama, JordiHuertas, F. J.PhlogopiteAFMBiotiteDissolutionInterferometryLaser confocal microscopyMicaOrganic acidThe alteration of two trioctahedral micas, biotite and phlogopite, was investigated at the meso, micro, and nanoscale using three complementary microscopy techniques to better understand mica surface reactivity. In situ and ex situ experiments were performed to monitor the mineral interface during dissolution in acidic solutions (nitric and oxalic acid, pH ∼ 1–2), over a temperature range of 25–100°C. The inorganic acid was used as a benchmark condition to elucidate the effect of the organic acid on the dissolution behavior. The observed topographical changes that arose during mineral alteration revealed the simultaneous occurrence of different processes that heterogeneously shaped the mica surface: 1) the retreat of pre-existing and newly formed steps (edge surface reactivity). In the case of biotite, layer curling and peeling-off occurred in the presence of nitric acid whereas dendritic-shaped step edges resulted from the effect of oxalic acid; 2) the nucleation of etch pits and the formation of dissolution channels on the (001) surface. Oxalic acid promoted the growth of the pits to such an extent that they were discernible at each scale and resolution investigated; and 3) precipitation of secondary phases. Overall, a multi-scale approach offers new insights into the dissolution behavior of biotite versus phlogopite and provides and enhances understanding of the effect that oxalic acid has on the surface reactivity of mica.This research was financially supported by the CGL2011–22567, CGL2014–55108-P, CGL2016–78783–C2-R, CGL2017–82331-R and CEX2018–000794-S projects (Spanish Ministry of Science and Innovation) and the Catalan project 2021 SGR 00308. IDAEA-CSIC is a Severo Ochoa Centre of Excellence (Spanish Ministry of Science and Innovation, Project CEX2018-000794-S). The authors thank Dr. Geoffrey Tick for assistance in the English editing of the text and the reviewers for the useful comments and suggestions. FJH, amdg.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/305840https://api.elsevier.com/content/abstract/scopus_id/85150879154reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.clay.2023.106923Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3058402026-05-22T06:33:51Z
dc.title.none.fl_str_mv Alteration of trioctahedral micas in the presence of inorganic and organic acids
title Alteration of trioctahedral micas in the presence of inorganic and organic acids
spellingShingle Alteration of trioctahedral micas in the presence of inorganic and organic acids
Cappelli, Chiara
Phlogopite
AFM
Biotite
Dissolution
Interferometry
Laser confocal microscopy
Mica
Organic acid
title_short Alteration of trioctahedral micas in the presence of inorganic and organic acids
title_full Alteration of trioctahedral micas in the presence of inorganic and organic acids
title_fullStr Alteration of trioctahedral micas in the presence of inorganic and organic acids
title_full_unstemmed Alteration of trioctahedral micas in the presence of inorganic and organic acids
title_sort Alteration of trioctahedral micas in the presence of inorganic and organic acids
dc.creator.none.fl_str_mv Cappelli, Chiara
Van Driessche, Alexander E. S.
Cama, Jordi
Huertas, F. J.
author Cappelli, Chiara
author_facet Cappelli, Chiara
Van Driessche, Alexander E. S.
Cama, Jordi
Huertas, F. J.
author_role author
author2 Van Driessche, Alexander E. S.
Cama, Jordi
Huertas, F. J.
author2_role author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Phlogopite
AFM
Biotite
Dissolution
Interferometry
Laser confocal microscopy
Mica
Organic acid
topic Phlogopite
AFM
Biotite
Dissolution
Interferometry
Laser confocal microscopy
Mica
Organic acid
description The alteration of two trioctahedral micas, biotite and phlogopite, was investigated at the meso, micro, and nanoscale using three complementary microscopy techniques to better understand mica surface reactivity. In situ and ex situ experiments were performed to monitor the mineral interface during dissolution in acidic solutions (nitric and oxalic acid, pH ∼ 1–2), over a temperature range of 25–100°C. The inorganic acid was used as a benchmark condition to elucidate the effect of the organic acid on the dissolution behavior. The observed topographical changes that arose during mineral alteration revealed the simultaneous occurrence of different processes that heterogeneously shaped the mica surface: 1) the retreat of pre-existing and newly formed steps (edge surface reactivity). In the case of biotite, layer curling and peeling-off occurred in the presence of nitric acid whereas dendritic-shaped step edges resulted from the effect of oxalic acid; 2) the nucleation of etch pits and the formation of dissolution channels on the (001) surface. Oxalic acid promoted the growth of the pits to such an extent that they were discernible at each scale and resolution investigated; and 3) precipitation of secondary phases. Overall, a multi-scale approach offers new insights into the dissolution behavior of biotite versus phlogopite and provides and enhances understanding of the effect that oxalic acid has on the surface reactivity of mica.
publishDate 2023
dc.date.none.fl_str_mv 2023
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/305840
https://api.elsevier.com/content/abstract/scopus_id/85150879154
url http://hdl.handle.net/10261/305840
https://api.elsevier.com/content/abstract/scopus_id/85150879154
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.clay.2023.106923
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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