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Kerolite-stevensite mixed-layers from the Madrid Basin, Central Spain

Published online by Cambridge University Press:  09 July 2018

J. L. Martin de Vidales ,
M. Pozo ,
J. M. Alia ,
F. Garcia-Navarro  and
F. Rull
J. L. Martin de Vidales
Affiliation:
Departamento de Química Agrícola, Geología y Geoquímica, Facultad de Ciencias, Universidad Autónoma, 28049-Madrid
M. Pozo
Affiliation:
Departamento de Química Agrícola, Geología y Geoquímica, Facultad de Ciencias, Universidad Autónoma, 28049-Madrid
J. M. Alia
Affiliation:
Laboratorio de Edafología-Mineralogía, Universidad de Castilla-La Mancha, Ronda de Calatrava s/n, Ciudad Real
F. Garcia-Navarro
Affiliation:
Laboratorio de Edafología-Mineralogía, Universidad de Castilla-La Mancha, Ronda de Calatrava s/n, Ciudad Real
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Abstract

Structural features of very highly disordered 2:1 trioctahedral phyllosilicates from the Madrid Basin have been studied. Application of Fourier methods to XRD patterns shows that these materials consist of random kerolite-stevensite mixed-layered phases (R = 0) with 50–80% kerolite layers, and have a very small particle size with a mean of three unit-cells stacked in the c* direction. IR spectrum deconvolution in OH-stretching and librational modes seems to indicate five different types of water. Specific surface measurements (N2, BET) indicate anomalous high values (240–320 m2/g). These results suggest important catalytic and surface chemistry applications.

Type
Research Article
Information
Clay Minerals , Volume 26 , Issue 3 , September 1991 , pp. 329 - 342
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1991

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