Abstract

We present here high-resolution solid state NMR spectra of several oxide and silicate materials that illustrate the improvements obtainable with very high external fields (18.8 and 21.1 T), with probes capable of tuning to a wide frequency range that allow observations of nuclides from high to low magnetogyric ratio. We discuss 27Al MAS spectra for the zeolite scolecite (CaAl2Si3O10·3H2O), 17O MAS data for analcime (NaAlSi2O6·H2O), calcium monoaluminate (CaAl2O4), and titanite (CaTiSiO5), 39K spin–echo spectra for leucite (KAlSi2O6), microline (KAlSi3O8), muscovite (KAl2(AlSi3O10)(OH2) and a potassium aluminosolicate glass, and preliminary 73Ge spin–echo MAS spectra for crystalline and glassy germanium dioxide (GeO2).

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