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Hydrothermal Synthesis of Zn-Smectites

Published online by Cambridge University Press:  01 January 2024

Shoji Higashi ,
Kazuhiko Miki  and
Sridhar Komarneni
Shoji Higashi
Affiliation:
Department of Natural Environmental Science, Faculty of Science, Kochi University, Kochi 780-8520, Japan
Kazuhiko Miki
Affiliation:
Department of Crop and Soil Sciences and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802-4801, USA
Sridhar Komarneni*
Affiliation:
Department of Crop and Soil Sciences and Materials Research Institute, The Pennsylvania State University, University Park, PA 16802-4801, USA
*
*E-mail address of corresponding author: komarneni@psu.edu
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Abstract

Two varieties of Zn-smectite were synthesized hydrothermally: sauconite, with an ideal composition of Na0.4Zn3(Si3.6Al0.4)O10(OH)2·nH2O; and a Zn equivalent of hectorite, with an ideal composition of Na0.4 (Li0.4Zn2.6)Si4O10(OH)2·nH2O (referred to here as Zn-hectorite). For comparison, hydrothermal synthesis of the related trioctahedral smectites of hectorite, Na0.4(Li0.4Mg2.6)Si4O10(OH)2·nH2O and hectorites containing Cu, Co or Ni in the octahedral sheets instead of Mg were also attempted. The results showed that sauconite, Zn-hectorite and hectorite could be synthesized in the temperature range 100–125°C but hectorites containing Cu, Co or Ni in the octahedral sheet, under the same conditions or even at a temperature of 150°C, could not.

Keywords

HectoriteHydrothermal SynthesisSauconiteSmectiteSynthetic Clays
Type
Research Article
Information
Clays and Clay Minerals , Volume 50 , Issue 3 , June 2002 , pp. 299 - 305
Copyright
Copyright © 2002, The Clay Minerals Society

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