English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/117570
COMPARTIR / IMPACTO:
Estadísticas
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Título

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

AutorPimentel, Carlos ; Pina, Carlos M. ; Gnecco, Enrico
Fecha de publicación26-abr-2013
EditorAmerican Chemical Society
CitaciónCrystal Growth and Design, 13: 2557- 2563 (2013)
ResumenEpitaxial 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 (ßcalcite = [a(Ca2+)·a(CO32¿)/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 (¿ > 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.
Versión del editorhttp://dx.doi.org/10.1021/cg400315g
URIhttp://hdl.handle.net/10261/117570
DOI10.1021/cg400315g
Identificadoresdoi: 10.1021/cg400315g
issn: 1528-7505
Aparece en las colecciones: (IGEO) Artículos
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.