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Título: | Experimental clay-mineral formation from a subvolcanic rock by interaction with 1 M NaOH solution at room temperature |
Autor: | Drief, A.; Nieto, F.; Sánchez-Navas, A. | Palabras clave: | AEM Berthierine Interstratification Lizardite NaOH Smectite |
Fecha de publicación: | feb-2001 | Editor: | Clay Minerals Society | Citación: | Clays and Clay Minerals 49(1): 92-106 (2001) | Resumen: | The alteration process of a subvolcanic rock with calcic plagioclase, pyroxene, and olivine as major components was investigated by X-ray diffraction (XRD) and analytical and transmission electron microscopy (TEM/AEM). Experimental interaction with 1 M NaOH solution led to the formation of dioctahedral beidellite to Fe-rich montmorillonite after 1 and 3 d of reaction. This range of smectite composition is similar to that from natural subvolcanic-derived soil formed from the same parent material. After 14 d of reaction, a berthierine-smectite (B-S) interstratified clay had partially replaced the smectite. Although, the presence of smectite interlayers prevented analysis of pure berthierine, berthierine-rich B-S interstratifications have a composition similar to pure berthierine. After 40 d, the alteration process led to a 7-Å S interstratifications whose composition falls between greenalite and lizardite. A series of amorphous materials were also found in the 14 and 40-d experiments. The most abundant of these is a Si-Ca-Fe-rich material, whose chemical composition approaches that of the starting rock. In contrast, two other amorphous materials had a smectitic composition. | Descripción: | 15 páginas, 12 figuras, 4 tablas | Versión del editor: | http://www.clays.org/journal/archive/volume%2049/49-1-92.pdf http://dx.doi.org/10.1346/CCMN.2001.0490108 |
URI: | http://hdl.handle.net/10261/31941 | DOI: | 10.1346/CCMN.2001.0490108 | ISSN: | 0009-8604 | E-ISSN: | 1552-8367 |
Aparece en las colecciones: | (IACT) Artículos |
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Drief at al (2001).pdf | 7,36 MB | Adobe PDF | Visualizar/Abrir |
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