English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/18786
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 7 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Compositional and structural variation of Sudoite from the Betic Cordillera (Spain). A TEM/AEM Study.

AutorRuiz Cruz, María Dolores; Sanz de Galdeano, Carlos
Palabras claveBetic Cordillera
Dickite
Illite
Mixed-layer
Sudoite
Spain
Pyrophyllite
Fecha de publicacióndic-2005
EditorClay Minerals Society
CitaciónClays and Clay Minerals 53(6): 639-652 (2005)
ResumenSudoite from diagenetic to very low-grade metaclastites of the Betic Cordillera was studied by X-ray diffraction and transmission/analytical electron microscopy. Sudoite formed directly from dickite, the assemblage dickite + sudoite + illite being replaced at increasing metamorphic grade by the assemblage pyrophyllite + sudoite + illite. Sudoite ranges in composition from Mg-rich to Fe-rich chemistries. In addition, a wide variety of mixed-layered structures (illite-sudoite, pyrophyllite-sudoite, and dickite-sudoite) was also identified. Mg-rich sudoite shows a mean chemical composition of (Al2.91Fe2+ 0.25Mg1.80)(Si3.10Al0.90)O10(OH)8, and a IIb ordered structure with b = 9.055 Å. Intermediate Fe-Mg sudoite exhibits a very variable composition, the Fe-rich phases having a mean composition of (Al2.09Fe3+ 0.61Fe2+ 0.87Mg1.44)(Si3.31Al0.69O10(OH)8. These are disordered polytypes with b values ranging from 9.070 to 9.101 Å. Fe occurs in both octahedral sheets, according to two types of substitutions: Fe3+ for Al in the dioctahedral sheet and Fe2+ for Mg in the trioctahedral sheet. Sudoite with such a composition has not been described previously.
Descripción14 páginas, 11 figuras, 5 tablas.
Versión del editorhttp://dx.doi.org/10.1346/CCMN.2005.0530610
URIhttp://hdl.handle.net/10261/18786
DOI10.1346/CCMN.2005.0530610
ISSN0009-8604
Aparece en las colecciones: (IACT) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
639.pdf2,09 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 



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