| Título: | Ni-sepiolite-falcondoite in garnieritemineralization from the FalcondoNi-laterite deposit, Dominican Republic |
| Autores: | Tauler, Esperança ; Proenza, Joaquín A. ; Galí Medina, Salvador ; Lewis , John F. ; Labrador Carrasco, Manuel ; García Romero, Emilia ; Súarez Barrios, Mercedes ; Longo, Francisco ; Bloise, Giovanni |
| Tipo de documento: | texto impreso |
| Editorial: | Mineralogical Society, 2009 |
| Dimensiones: | application/pdf |
| Nota general: | info:eu-repo/semantics/openAccess |
| Idiomas: | |
| Palabras clave: | Estado = Publicado , Materia = Ciencias: Geología: Mineralogía , Tipo = Artículo |
| Resumen: |
New chemical and structural data on sepiolite-falcondoite in garnierite veins from the Falcondo Ni-laterite deposits, central Dominican Republic, are reported. Samples of Ni-sepiolitefalcondoite vary in colour from whitish green to green depending on the NiO content (wt.%) and the amount of silica present. The texture is normally schistose and friable but samples with considerable quartz and/or amorphous silica are compact and hard. Back-scattered electron images indicate that the samples are composed of at least three generations of Ni-sepiolite-falcondoite. The extreme refined cell parameters for Ni-sepiolite-falcondoite vary from 13.400(2), 27.006(4), 5.273(1) A? to 13.340(3), 27.001(6), 5.267(1) A? (space group Pncn). As the Ni content increases there is a small reduction in the a parameter. Chemical compositions determined by electron probe microanalysis cover a large interval of the Ni-sepiolite-falcondoite solid solution (Fal3 and Fal77). Individual samples show a considerable range in composition with the widest range determined in one sample from 4.63 to 22.40 wt.% NiO. |
| En línea: | https://eprints.ucm.es/id/eprint/21650/1/2009_Falcondoite.pdf |
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