The effect of barium on calcite {101¯4} surfaces during growth

In situ atomic force microscopy (AFM) experiments have provided information about the effect of Ba21 on crystal growth of calcite {101¯4} surfaces. The microtopographic features observed have been interpreted by considering both the structural control that the calcite surfaces exert on the incorpora...

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Detalles Bibliográficos
Autores: Astilleros García-Monge, José Manuel, Pina Martínez, Carlos Manuel, Fernández Díaz, María Lourdes, Putnis, Andrew
Tipo de recurso: artículo
Fecha de publicación:2000
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/57133
Acceso en línea:https://hdl.handle.net/20.500.14352/57133
Access Level:acceso abierto
Palabra clave:548.5
Crystal growth
Calcite
Barium
Cristalografía (Geología)
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spelling The effect of barium on calcite {101¯4} surfaces during growthAstilleros García-Monge, José ManuelPina Martínez, Carlos ManuelFernández Díaz, María LourdesPutnis, Andrew548.5Crystal growthCalciteBariumCristalografía (Geología)In situ atomic force microscopy (AFM) experiments have provided information about the effect of Ba21 on crystal growth of calcite {101¯4} surfaces. The microtopographic features observed have been interpreted by considering both the structural control that the calcite surfaces exert on the incorporation of divalent cations and the supersaturation state of the solution used. Pinning of the calcite growth steps occurs at low Ba concentrations, suggesting specific sites for Ba incorporation. When the Ba content of the solution is increased the advancement of monomolecular steps is observed. Although [4¯41]1 and [481¯]1 steps advance showing characteristic jagged edges, the parallel steps (i.e., [4¯41]2 and [481¯]2) remain practically immobile. This fact can be explained by considering the nonsymmetrically related distribution of large and small sites along the calcite steps and the easier incorporation of barium on the former. The measured increase in the height of the newly grown steps is also consistent with such preferential incorporation of Ba in certain positions. A further increase in the Ba concentration of the solutions leads to the formation of bidimensional nuclei on the calcite {101¯4} surfaces. The nature of these nuclei is discussed taking into account the supersaturation of the solution with respect to two possible structures that can accommodate Ba: the calcite-type structure and the aragonite-type structure.Elsevier Science LtdUniversidad Complutense de Madrid20002000-01-0120002000-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/57133reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/571332026-06-02T12:44:21Z
dc.title.none.fl_str_mv The effect of barium on calcite {101¯4} surfaces during growth
title The effect of barium on calcite {101¯4} surfaces during growth
spellingShingle The effect of barium on calcite {101¯4} surfaces during growth
Astilleros García-Monge, José Manuel
548.5
Crystal growth
Calcite
Barium
Cristalografía (Geología)
title_short The effect of barium on calcite {101¯4} surfaces during growth
title_full The effect of barium on calcite {101¯4} surfaces during growth
title_fullStr The effect of barium on calcite {101¯4} surfaces during growth
title_full_unstemmed The effect of barium on calcite {101¯4} surfaces during growth
title_sort The effect of barium on calcite {101¯4} surfaces during growth
dc.creator.none.fl_str_mv Astilleros García-Monge, José Manuel
Pina Martínez, Carlos Manuel
Fernández Díaz, María Lourdes
Putnis, Andrew
author Astilleros García-Monge, José Manuel
author_facet Astilleros García-Monge, José Manuel
Pina Martínez, Carlos Manuel
Fernández Díaz, María Lourdes
Putnis, Andrew
author_role author
author2 Pina Martínez, Carlos Manuel
Fernández Díaz, María Lourdes
Putnis, Andrew
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 548.5
Crystal growth
Calcite
Barium
Cristalografía (Geología)
topic 548.5
Crystal growth
Calcite
Barium
Cristalografía (Geología)
description In situ atomic force microscopy (AFM) experiments have provided information about the effect of Ba21 on crystal growth of calcite {101¯4} surfaces. The microtopographic features observed have been interpreted by considering both the structural control that the calcite surfaces exert on the incorporation of divalent cations and the supersaturation state of the solution used. Pinning of the calcite growth steps occurs at low Ba concentrations, suggesting specific sites for Ba incorporation. When the Ba content of the solution is increased the advancement of monomolecular steps is observed. Although [4¯41]1 and [481¯]1 steps advance showing characteristic jagged edges, the parallel steps (i.e., [4¯41]2 and [481¯]2) remain practically immobile. This fact can be explained by considering the nonsymmetrically related distribution of large and small sites along the calcite steps and the easier incorporation of barium on the former. The measured increase in the height of the newly grown steps is also consistent with such preferential incorporation of Ba in certain positions. A further increase in the Ba concentration of the solutions leads to the formation of bidimensional nuclei on the calcite {101¯4} surfaces. The nature of these nuclei is discussed taking into account the supersaturation of the solution with respect to two possible structures that can accommodate Ba: the calcite-type structure and the aragonite-type structure.
publishDate 2000
dc.date.none.fl_str_mv 2000
2000-01-01
2000
2000-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/57133
url https://hdl.handle.net/20.500.14352/57133
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Ltd
publisher.none.fl_str_mv Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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