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Silicate structures, higher order species

Construction of Higher Order Silicate Structures from the SigO20 Silicate Species... [Pg.302]

The structure of species in solution depends on numerous parameters (pH, temperature, nature of the cation of the ba.se, Al/Si ratio, etc.) and remains uncertain. The interpretation of AI and Si NMR spectra is complicated and uncertain because of the high lability of Al-O-Si bonds, 2-3 orders of magnitude higher than that of Si-O-Si bonds [96,97]. In the presence of alkaline cations (Na, Cs ), the complexes [(H0)3A10Si(0H)20Si03H3 J - - " and [(HOlaAlOSiOjHj-j are detected in. solution. With tetraalkylammonium cations, cages similar to those observed in silicate solution were found with different substitution ratios of silicon by aluminum. [Pg.59]

See other pages where Silicate structures, higher order species is mentioned: [Pg.155]    [Pg.231]    [Pg.666]    [Pg.302]    [Pg.551]    [Pg.242]    [Pg.482]    [Pg.207]    [Pg.268]    [Pg.114]    [Pg.54]    [Pg.397]    [Pg.571]    [Pg.352]   


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