Epitaxial Growth of Calcite Crystals on Dolomite and Kutnahorite (104) Surfaces

Epitaxial growth of calcite on dolomite and kutnahorite (104) surfaces has been promoted at room temperature by immersing cleavage rhombohedra of these minerals in highly supersaturated solutions with respect to calcite (βcalcite = [a(Ca2+)·a(CO3 2−)/Ksp,calcite] > 20). Scanning electron microsco...

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Detalles Bibliográficos
Autores: Pimentel Guerra, Carlos, Pina Martínez, Carlos Manuel, Gnecco, Enrico
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:español
OAI Identifier:oai:docta.ucm.es:20.500.14352/42856
Acceso en línea:https://hdl.handle.net/20.500.14352/42856
Access Level:acceso abierto
Palabra clave:548
Calcite
Crystals
Dolomite
Kutnahorite
Cristalografía (Geología)
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spelling Epitaxial Growth of Calcite Crystals on Dolomite and Kutnahorite (104) SurfacesPimentel Guerra, CarlosPina Martínez, Carlos ManuelGnecco, Enrico548CalciteCrystalsDolomiteKutnahoriteCristalografía (Geología)Epitaxial growth of calcite on dolomite and kutnahorite (104) surfaces has been promoted at room temperature by immersing cleavage rhombohedra of these minerals in highly supersaturated solutions with respect to calcite (βcalcite = [a(Ca2+)·a(CO3 2−)/Ksp,calcite] > 20). Scanning electron microscopy (SEM) images revealed an inhomogeneous coverage of dolomite and kutnahorite surfaces by large calcite crystals. In situ atomic force microscopy (AFM) observations showed that, while calcite islands rapidly grow perpendicularly to the substrates, their lateral spreading is slower. Furthermore, the accumulated strain associated with the relatively high calcite−substrate lattice misfits (δ > 2.2%) is accommodated by the generation of screw dislocations, which are evidenced by growth spirals on calcite three-dimensional islands. These observations are consistent with the Volmer−Weber epitaxial growth mode, characteristic of high overgrowth−substrate lattice misfits. Additional nanomanipulation experiments conducted with the AFM tip allowed us to remove calcite islands on both dolomite and kutnahorite (104) surfaces and to provide first estimates of shear strength.American Chemical SocietyUniversidad Complutense de Madrid20132013-01-0120132013-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/42856reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Españolspaopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/428562026-06-02T12:44:21Z
dc.title.none.fl_str_mv Epitaxial Growth of Calcite Crystals on Dolomite and Kutnahorite (104) Surfaces
title Epitaxial Growth of Calcite Crystals on Dolomite and Kutnahorite (104) Surfaces
spellingShingle Epitaxial Growth of Calcite Crystals on Dolomite and Kutnahorite (104) Surfaces
Pimentel Guerra, Carlos
548
Calcite
Crystals
Dolomite
Kutnahorite
Cristalografía (Geología)
title_short Epitaxial Growth of Calcite Crystals on Dolomite and Kutnahorite (104) Surfaces
title_full Epitaxial Growth of Calcite Crystals on Dolomite and Kutnahorite (104) Surfaces
title_fullStr Epitaxial Growth of Calcite Crystals on Dolomite and Kutnahorite (104) Surfaces
title_full_unstemmed Epitaxial Growth of Calcite Crystals on Dolomite and Kutnahorite (104) Surfaces
title_sort Epitaxial Growth of Calcite Crystals on Dolomite and Kutnahorite (104) Surfaces
dc.creator.none.fl_str_mv Pimentel Guerra, Carlos
Pina Martínez, Carlos Manuel
Gnecco, Enrico
author Pimentel Guerra, Carlos
author_facet Pimentel Guerra, Carlos
Pina Martínez, Carlos Manuel
Gnecco, Enrico
author_role author
author2 Pina Martínez, Carlos Manuel
Gnecco, Enrico
author2_role author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 548
Calcite
Crystals
Dolomite
Kutnahorite
Cristalografía (Geología)
topic 548
Calcite
Crystals
Dolomite
Kutnahorite
Cristalografía (Geología)
description Epitaxial growth of calcite on dolomite and kutnahorite (104) surfaces has been promoted at room temperature by immersing cleavage rhombohedra of these minerals in highly supersaturated solutions with respect to calcite (βcalcite = [a(Ca2+)·a(CO3 2−)/Ksp,calcite] > 20). Scanning electron microscopy (SEM) images revealed an inhomogeneous coverage of dolomite and kutnahorite surfaces by large calcite crystals. In situ atomic force microscopy (AFM) observations showed that, while calcite islands rapidly grow perpendicularly to the substrates, their lateral spreading is slower. Furthermore, the accumulated strain associated with the relatively high calcite−substrate lattice misfits (δ > 2.2%) is accommodated by the generation of screw dislocations, which are evidenced by growth spirals on calcite three-dimensional islands. These observations are consistent with the Volmer−Weber epitaxial growth mode, characteristic of high overgrowth−substrate lattice misfits. Additional nanomanipulation experiments conducted with the AFM tip allowed us to remove calcite islands on both dolomite and kutnahorite (104) surfaces and to provide first estimates of shear strength.
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-01-01
2013
2013-01-01
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/20.500.14352/42856
url https://hdl.handle.net/20.500.14352/42856
dc.language.none.fl_str_mv Español
spa
language_invalid_str_mv Español
language spa
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 American Chemical Society
publisher.none.fl_str_mv American Chemical Society
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 15,300724

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