Effect of alkali metal cations on silicate structures in aqueous solution

A. V. McCormick; A. T. Bell; C. J. Radke

doi:10.1021/bk-1988-0368.ch014

Effect of alkali metal cations on silicate structures in aqueous solution

A. V. McCormick, A. T. Bell, C. J. Radke

Chemical Engineering and Materials Science

Research output: Contribution to journal › Conference article › peer-review

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Abstract

By means of ²⁹Si NMR spectroscopy, it is established that the distribution of silicate anions in alkaline silicate solutions is a moderate function of base composition. At a fixed SiO₂ concentration and silicate ratio, the proportion of Si present in oligomeric and cage-like structures increases in progressing from Li to Cs hydroxide. This trend is ascribed to cation-silicate anion pairing and to a higher selectivity for ion pairing by large silicate anions as cation size increases.

Original language	English (US)
Pages (from-to)	222-235
Number of pages	14
Journal	ACS Symposium Series
Issue number	368
DOIs	https://doi.org/10.1021/bk-1988-0368.ch014
State	Published - 1988
Event	Perspectives in Molecular Sieve Science - Toronto, Ont, Can Duration: Jun 5 1988 → Jun 11 1988

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abstract = "By means of 29Si NMR spectroscopy, it is established that the distribution of silicate anions in alkaline silicate solutions is a moderate function of base composition. At a fixed SiO2 concentration and silicate ratio, the proportion of Si present in oligomeric and cage-like structures increases in progressing from Li to Cs hydroxide. This trend is ascribed to cation-silicate anion pairing and to a higher selectivity for ion pairing by large silicate anions as cation size increases.",

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T1 - Effect of alkali metal cations on silicate structures in aqueous solution

AU - McCormick, A. V.

AU - Bell, A. T.

AU - Radke, C. J.

PY - 1988

Y1 - 1988

N2 - By means of 29Si NMR spectroscopy, it is established that the distribution of silicate anions in alkaline silicate solutions is a moderate function of base composition. At a fixed SiO2 concentration and silicate ratio, the proportion of Si present in oligomeric and cage-like structures increases in progressing from Li to Cs hydroxide. This trend is ascribed to cation-silicate anion pairing and to a higher selectivity for ion pairing by large silicate anions as cation size increases.

AB - By means of 29Si NMR spectroscopy, it is established that the distribution of silicate anions in alkaline silicate solutions is a moderate function of base composition. At a fixed SiO2 concentration and silicate ratio, the proportion of Si present in oligomeric and cage-like structures increases in progressing from Li to Cs hydroxide. This trend is ascribed to cation-silicate anion pairing and to a higher selectivity for ion pairing by large silicate anions as cation size increases.

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JF - ACS Symposium Series

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T2 - Perspectives in Molecular Sieve Science

Y2 - 5 June 1988 through 11 June 1988

ER -

Effect of alkali metal cations on silicate structures in aqueous solution

Abstract

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