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Transformation of Sericite into an Interstratified Mineral

Published online by Cambridge University Press:  01 July 2024

Katsutoshi Tomita  and
Toshio Sudo
Katsutoshi Tomita
Affiliation:
Institute of Earth Sciences, Kagoshima University, Kagoshima, Japan
Toshio Sudo
Affiliation:
Geological and Mineralogical Institute, Faculty of Science, Tokyo University of Education, Tokyo, Japan
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Abstract

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Sericite was K-depleted with molten LiNO3. The sample was changed into an interstratified structure in the presence of a small amount of LiNO3 after prolonged treatment, and in the presence of a considerable amount of LiNO3 a similar structure was formed after about 3 hr of reaction. In the case of the presence of the proper amount of NaCl, a mixed-layer structure was easily obtained by treatment for a long period of time with a considerable amount of molten LiNO3.

The interstratified mineral had a basal spacing of 22 Å–23·3 Å which was expanded to 25 Å–27·6 Å by treatment with ethylene glycol.

Résumé

Résumé

Une séricite a été épuisée en potassium par LiNO3 fondu. L’échantillon a été transformé en une structure interstratifiée en présence d’une petite quantité de LiNO3 après un traitement prolongé; en présence d’une quantité importante de LiNO3. une structure similaire s’est formée après environ trois heures de réaction. Dans le cas où une quantitè appropriée de NaCI est présente, une structure interstratifiée a été facilement obtenue par un traitement de longue durée avec une quantité importante de LiNO3 fondu.

Le minéral interstratifié a un espacement basal de 22–23,3 Å, qui gonfle à 25–27,6 Å après traitement à l’éthylène-glycol.

Kurzreferat

Kurzreferat

Mit Hilfe von geschmolzenem LiNO3 wurde einem Sericit Kalium entzogen. In Gegenwart einer geringen Menge von LiNO3 wurde die Probe nach längerer Behandlung in ein zwischengeschichtetes Gefüge verwandelt, und in Gegenwart einer griösseren Menge von LiNO3 wurde ein ähnliches Gefüge bereits nach drei Stunden Reaktionszeit gebildet. Bei Anwesenheit der entsprechenden Menge von NaCl konnte eine Gemischtschichtstruktur leicht erhalten werden durch Behandlung über eine lämgere Zeitspanne mit einer beträchtlichen Menge von geschmolzenem LiNO3.

Das zwischengeschichtete Mineral hatte einen basalen Abstand von 22 Å–23,3 Å der durch Behandlung mit Äthylenglykol auf 25 Å–27,6 Å erweitert wurde.

Резюме

Резюме

Серицит был подвергнут обработке расплавленным LiNO3 с целью удаления К. Образец претерпел превращение в смешаннослойную структуру в присутствии небольшого количества LiNO3 при продолжительной обработке или же в присутствии достаточно большого количества LiО3 в течение трех часов. В присутствии достаточного количества NаСl смешаннослойная структура легко получалась при обработке в течение длительного периода времени большим количеством расплавленного LiО3.

Смешаннослойный минерал характеризуется базальным межплоскостным расстоянием 22–23,3 0А, которое увеличивается до 25–27,6 0А при обработке этилен-гликолем.

Type
Research Article
Information
Clays and Clay Minerals , Volume 19 , Issue 4 , August 1971 , pp. 263 - 270
Copyright
Copyright © 1971, The Clay Minerals Society

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