Metasilicate spectrum

Fig. 5.78. Variable-temperature NMR spectra of the lithium or-thosilicate/metasilicate mixture. Typically, narrow spectra required 64 pulses and broader spectra 500 pulses. The line broadening used in processing each spectrum was less than 10% of the total line width. (Reprinted from I. Faman and J. F. Stebbins, J. Am. Chem. Soc. 112 32,1990.)...

FIG. 20. NMR spectrum of sodium metasilicate. Chemical shifts are in ppm relative to Me4Si. 

The preparation of europium metasilicate hydrate from solutions of europium bromide and sodium metasilicate has been described.The kinetics and mechanism of the reduction of thiocyanato- and isothiocyanato-penta-amminecobalt(iii) ions by europium(ii) in acid solution have been discussed in terms of europium(ii) attack on the ambidentate bridging ligand at the end remote from the cobalt centre. The differences in the activation enthalpies for the reduction of the complexes were attributed to (a) differences in enthalpy of formation of the precursor complex Eu - X - Co (NH3)5, and (b) ease of stretching of the Co—S or Co—N bond in the precursor complex. The low-temperature Mossbauer spectrum of EUH2 suggested the covalent transfer of electron density. to the metal 6s orbital to be more marked in EuH2 than EuO. ... 

Additionally, the subsequent transformation following the addition of water has been well monitored by both Al and Si MAS NMR spectra. As monomers and dimers of Na/K metasilicates gradually condense, the corresponding narrow signals in the Si MAS NMR spectrum as well as the high-frequency shoulder in the Al MAS NMR spectrum disappear... 

Figure 6.11 XRD spectrum of the crystallized glass-ceramic showing the presence of cristobalite, lithium metasilicate, lithium disilicate, and lithium orthophosphate phases.

Spectrum Chems. Lab. Prods. Wako Chem. GmbH Trade Names Containing Lipothix 200-S Potassium metasilicate. See Potassium silicate Potassium methyl cocoyl taurate... 

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