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Problems in layer-charge determination of montmorillonites

Published online by Cambridge University Press:  09 July 2018

G. Lagaly ,
M. Fernandez Gonzalez  and
Armin Weiss
G. Lagaly
Affiliation:
Institut für Anorganiche Chemie der Universität Kiel. 23 Kiel, Olshausenstraβe 40/60
M. Fernandez Gonzalez
Affiliation:
Institut für Anorganiche Chemie der Universität Kiel. 23 Kiel, Olshausenstraβe 40/60
Armin Weiss
Affiliation:
Institut für Anorganiche Chemie der Universität Kiel. 23 Kiel, Olshausenstraβe 40/60
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Abstract

Spanish montmorillonites from Frente Archidona were used to demonstrate the determination of charge density, CEC and, in mixtures, the montmorillonite content by the aikylammonium method. Special attention is directed to heterogeneous montmorillonites and the determination of the charge density distribution. Some problems which arise by application of the method are discussed: relations between layer charge and cation densities, particle size corrections, microstructures and unsymmetric charge distributions in the interlayer spaces.

Sommaire

Sommaire

Des montmorillonites espagnoles de Frente Archidona ontétéutilisées pour démontrer la determination de la densité de charge, de CEC et, dans des melanges, la teneur en montmorillonite à l'aide de la méthode à l'alkylammonium. Une attention particulière est donnée aux montmorillonites hétérogènes et à la determination de la variation de la densité de charge. Certains problèmes découlant de l'application de la méthode sont discutés: les rapports entre la charge de couche et ies densités de cation, les rectifications des dimensions des particules, les microstructures et les repartitions asymétriques de charge dans les espaces inter-couches.

Kurzreferat

Kurzreferat

Spanische Montmorillonite von Frente Archidona wurden benutzt, um die Bestimmung der Ladungsdichte, der Kationenaustauschkapazitàt und, in Gemischen, des Montmorillonitgehalts nach dem Alkylammoniumverfahren zu demonstrieren. Besondere Aufmerksamkeit wird heterogenen Montmorilloniten und der Bestimmung der Ladungsdichteverteilung gewidmet. Frageu ùber Beziehungen zwischen Schichtladungs- und Kationendichten, Teilchengròssenkorrekturen, Feingefiigen und unsymmetrischen Ladungsverteilungen in den Zwischenschichtràumen werdu diskutiert.

Referata

Referata

Se utilizaron montmorillonitas espanolas procedentes de Frente Archidona para demostrar la determinación de densidad de carga, CEC y, en las mezclas, el contenido de montmorillonita por el mètodo del alkilamonio. Se presta especial atensión a las montmorillonitas heterogéneas y a la determinación de la distribución de densidad de carga. Se comentan algunos problemas surgidos por la aplicación del mètodo: relaciones entre la carga de capa y densidades catiónicas, correcciones del tamafio de particulas, microestructuras y distribuciones asimétricas de carga en los espacios entre las capas.

Type
Research Article
Information
Clay Minerals , Volume 11 , Issue 3 , September 1976 , pp. 173 - 187
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1976

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