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Intercalation of Salts in Halloysite

Published online by Cambridge University Press:  01 July 2024

R. M. Carr ,
N. Chaikum  and
N. Patterson
R. M. Carr
Affiliation:
Chemistry Department, University of Otago, Dunedin, New Zealand
N. Chaikum
Affiliation:
Chemistry Department, Mahidol University, Bangkok 4, Thailand
N. Patterson
Affiliation:
Control Laboratory, N. Z. Aluminium Smelters, Invercargill, New Zealand
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Abstract

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Several new salt intercalation complexes of halloysite have been prepared and characterized using X-ray powder diffraction techniques taking into account both the position and the shape of the d001 peaks. The amount of intercalated ion in some fully complexed halloysites has been directly determined using conventional analytical techniques. The results show that less than half of the theoretical amount of salt is intercalated into the clay; the amount of salt depending on its nature and, where hydrolyzable ions are present, on the pH. Infrared spectra taken of some complexes give an indication of the nature of the interaction within interlayer space and elsewhere. The interactions are weak and are either dipolar attractions or hydrogen bonds. The ions which show the greatest tendency to intercalate with halloysite are water structure-breaking cations or hydrogen-bonding anions.

Резюме

Резюме

Были получены несколько новых комплексов галлуазита, переслаивающегося с солью, которые охарактеризованы с использованием порошкового метода рентгеноструктурного анализа, причем во внимание принимались как положение, так и форма пиков d001. Количество внедрившихся ионов в некоторых полностью укомплектованных галлуазитах определялось с использованием обычных аналитических методов. Результаты показывают, что менее, чем половина теоретического количества соли внедрилась в глину. Количество соли зависит от ее природы и, если присутствуют ионы, поддающиеся гидролизу, от pH. Инфракрасные спектры некоторых комплексов указывают на природу взаимодействия в межслойном пространстве и других местах. Взаимодействия слабы и являются или дипольным притяжением, или водородными связями. Ионы, которые проявляют наибольшую тенденцию к внедрению в галлуазит, являются водными структуро-разрушающими катионами или водородо-связующими анионами.

Kurzreferat

Kurzreferat

Etliche neue Salzeinbettungskomplexe von Halloysit wurden prepariert und durch Röntgenpulverdiagramme charakterisiert, indem sowohl die Position wie auch die Form der d001 Signale in Betracht gezogen wurden. Die Menge von eingebetteten Ionen wurde unmittelbar mit konventionellen, analytischen Techniken in einigen vollkomplexierten Halloysiten bestimmt. Die Resultate zeigen, daß weniger als die Hälfte der theoretischen Menge des Salzes in den Ton eingebettet ist. Die Menge des Salzes hängt von ihrer Natur, und falls die Ionen hydrolisierbar sind, von dem pH ab. Infrarotspektra, welche von einigen Komplexen aufgenommen wurden, geben Anhaltspunkte über die Natur der Wechselwirkung in der Zwischenschicht ab. Diese Wechselwirkungen sind schwach und entweder dipolare Anziehungen oder Wasserstoffbindungen. Diejenigen Ionen, die die größte Tendenz zur Einbettung in Halloysiten zeigen, sind Wasserstruktur- brechende Kationen oder Wasserstoff-bindende Anion

Keywords

HalloysiteIntercalationInterlayerKaolinite
Type
Research Article
Information
Clays and Clay Minerals , Volume 26 , Issue 2 , April 1978 , pp. 144 - 152
Copyright
Copyright © 1978, The Clay Minerals Society

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