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A Nickel Hydroxide-Vermiculite Complex: Preparation and Characterization

Published online by Cambridge University Press:  28 February 2024

Motoki Uehara ,
Atsushi Yamzaki ,
Taku Umezawa ,
Koichiro Takahashi  and
Sadao Tsutsumi
Motoki Uehara*
Affiliation:
National Institute for Research in Inorganic Materials, 1-1, Namiki, Tsukuba-shi, Ibaraki 305-0044, Japan
Atsushi Yamzaki
Affiliation:
Department of Resources and Environmental Engineering, School of Science and Engineering, Waseda University, 3-4-1, Ohkubo, Shinjuku-ku, Tokyo 169-8555, Japan
Taku Umezawa
Affiliation:
Institute of Earth Science, School of Education, Waseda University, 1-6-1, Nishiwaseda, Shinjuku-ku, Tokyo 169-8050, Japan
Koichiro Takahashi
Affiliation:
National Institute for Research in Inorganic Materials, 1-1, Namiki, Tsukuba-shi, Ibaraki 305-0044, Japan
Sadao Tsutsumi
Affiliation:
Institute of Earth Science, School of Education, Waseda University, 1-6-1, Nishiwaseda, Shinjuku-ku, Tokyo 169-8050, Japan
*
E-mail of corresponding author: m-uehara@pa2.so-net.ne.jp
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Abstract

A nickel hydroxide-vermiculite complex (NHVC) with csinβ = 1.41 nm and particle sizes from 0.075 to 0.15 mm was obtained hydrothermally by adding nickel nitrate solution to vermiculite from Transvaal, South Africa. The quantity of nickel hydroxide included in NHVC was controlled by adjusting the concentration of the nickel nitrate solution. The thermal behavior of NHVC at 450°C or above was independent of the Ni content. However, small differences exist in the dehydration behavior of NHVC below 450°C. One-dimensional Fourier electron density analysis of the NHVC structure containing 2.43 mol of Ni per half unit cell showed that Ni cations occupy the interlayer of NHVC, and 10% of the total Ni cations is in the ditrigonal cavity of the basal-oxygen plane of the tetrahedral sheet.

Keywords

Clay-Inorganic ComplexOne-Dimensional Fourier Electron Density MapNickel HydroxideVermiculite
Type
Research Article
Information
Clays and Clay Minerals , Volume 47 , Issue 6 , December 1999 , pp. 726 - 731
Copyright
Copyright © 1999, The Clay Minerals Society

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