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Synthesis of 1:1 And 2:1 Iron Phyllosilicates and Characterization of Their Iron State by Mössbauer Spectroscopy

Published online by Cambridge University Press:  02 April 2024

Tadashi Mizutani ,
Yoshiaki Fukushima ,
Akane Okada ,
Osami Kamigaito  and
Takayuki Kobayashi
Tadashi Mizutani*
Affiliation:
Toyota Central Research and Development Labs, Inc., Nagakute, Aichi-gun 480-11, Japan
Yoshiaki Fukushima
Affiliation:
Toyota Central Research and Development Labs, Inc., Nagakute, Aichi-gun 480-11, Japan
Akane Okada
Affiliation:
Toyota Central Research and Development Labs, Inc., Nagakute, Aichi-gun 480-11, Japan
Osami Kamigaito
Affiliation:
Toyota Central Research and Development Labs, Inc., Nagakute, Aichi-gun 480-11, Japan
Takayuki Kobayashi
Affiliation:
Department of Physics, Shiga University of Medical Science, Ohtsu-shi, Shiga 520-21, Japan
*
1Present address: Department of Materials Science, Tottori University, Koyama-cho, Tottori 680, Japan.
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Abstract

Iron phyllosilicates with 1:1 and 2:1 layer structures were prepared from silicic acid, ferrous sulfate and sodium hydroxide. Hydrothermal treatment at 100–200°C of a reaction mixture with an initial Fe/Si ratio of 1.5 gave the 2:1 iron phyllosilicate, whereas a Fe/Si ratio of 2.25 gave the 1:1 phyllosilicate. The 57Fe Mössbauer spectroscopy showed that 60% of the iron in the 1:1 phyllosilicate is ferrous, versus only 3% in the 2:1 phyllosilicate. The values of quadrupole coupling showed that the iron-oxygen tetrahedra and octahedra in the 2:1 phyllosilicate were more deformed than those in the 1:1 phyllosilicate.

Keywords

IronMössbauer spectroscopyPhyllosilicateSynthesis
Type
Research Article
Information
Clays and Clay Minerals , Volume 39 , Issue 4 , August 1991 , pp. 381 - 386
Copyright
Copyright © 1991, The Clay Minerals Society

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