The Effect of Alkali Metal Cations on The Structure of Dissolved Silicate Oligomers
Keyword(s):
AbstractBy means of 29Si 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. Interactions between alkali metal cations and silicate anions are investigated using NMR spectroscopy of the cations; in this way the concentration of ion pairs is measured as a function of cation size. As a result the silicate redistribution is ascribed to cation-silicate anion pairing and to a higher selectivity for ion pairing by large silicate anions as cation size increases.
1967 ◽
Vol 45
(20)
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pp. 2411-2418
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1967 ◽
Vol 40
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pp. 1325-1332
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1970 ◽
Vol 43
(12)
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pp. 3689-3694
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1972 ◽
Vol 12
(4)
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pp. 596-598
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1976 ◽
Vol 98
(25)
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pp. 7955-7959
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1980 ◽
Vol 73
(1)
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pp. 75-79
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2016 ◽
Vol 28
(5-6)
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pp. 608-615
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