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Synthesis of Mixed-Layer Kaolinite/Smectite

Published online by Cambridge University Press:  01 July 2024

Jan Środoń
Jan Środoń*
Affiliation:
Institute of Geology, Polish Academy of Sciences, 31-002 Kraków, Senacka 3, Poland
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Abstract

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Mixed-layer kaolinite/smectites containing 40–90% kaolinite layers have been synthesized from Wyoming smectite. Run times were 4 months at 156°C in solutions of A1C13∙6H2O and KCl or CaCl2. Similar KCl runs devoid of Al3+ yielded mixed-layer illite/smectites. The supply of Al3+, rather than pK or pH, seems to control the alteration of smectite toward kaolinite or illite.

Резюме

Резюме

Смешанно-слойные каолиниты/смектиты, содержающие 40–90% каолинитовых слоев, были синтезированы из смектитов Вайоминга. Процесс продолжался 4 месяца при 156°С в растворах А1С13–6Н2O и КС1 или СаС12. Подобные процессы с КС1 но без А13+ приводили к формированию смешано-слойных иллит/смектитов. Поступление А13+, а не рК или рН, по-видимому, контролирует превращение смектита в каолинит или иллит. [К.К.]

Resümee

Resümee

Aus dem Smektit von Wyoming wurden Kaolinit/Smektit-Wechsellagerungen mit 40–90% Kaolinitlagen synthetisiert. Die Versuchszeiten betrugen 4 Monate bei 156°C mit Lösungen aus A1C13-6H20 mit KCl oder CaCU. Ähnliche KCl-Versuche ohne Al3+ lieferten Illit/Smektit-Wecbsellagerungen. Das Angebot an Al3+ scheint die Umwandlung von Smektit in Kaolinit oder Illit in stärkerem Maß zu kontrollieren als pK oder pH. [U.W.]

Résumé

Résumé

Des smectites/kaolinite à couches mélangées contenant de 40-90% de couches de kaolinite ont été synthétisées à partir de smectite du Wyoming. Les périodes étaient de 4 mois à 156°C dans des solutions d'ACl3∙6H2O et de KCl ou CaCl2. Des séries de KCl semblables sans Al3+ ont fourni des smectites/illite à couches melangées. La provision d'Al3+, plutôt que le pK ou le pH semble contrôler l'altération de la smectite vers une kaolinite ou une illite. [D.J.]

Keywords

InterstratificationKaoliniteMixed layerMontmorilloniteSmectiteSynthesis
Type
Research Article
Information
Clays and Clay Minerals , Volume 28 , Issue 6 , December 1980 , pp. 419 - 424
Copyright
Copyright © Clay Minerals Society 1980

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