High-resolution oxygen-17 NMR of solid silicates

Journal Article · Tue Jan 01 23:00:00 EST 1991 · Journal of the American Chemical Society; (United States)

DOI:https://doi.org/10.1021/ja00001a006· OSTI ID:5237548

Mueller, K T; Wu, Y; Chmelka, B F ^[1]; Stebbins, J ^[2]; Pines, A ^[3]

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1. Lawrence Berkeley Lab., CA (USA)
2. Stanford Univ, CA (USA)
3. Univ. of California, Berkeley (USA)

Several{sup 17}O-enriched silicates were studied by use of dynamic angle spinning (DAS) and double rotation (DOR) nuclear magnetic resonance spectroscopy. These methods average away second-order quadrupolar interactions by reorienting a sample about a time-dependent axis, thereby yielding high-resolution spectra of oxygen-17 nuclei. A narrow spectral line is observed for each distinct oxygen site at the sum of the isotropic chemical shift and the field-dependent isotropic second-order quadrupolar shift. Resolution is increased by up to 2 orders of magnitude compared to conventional magic angle spinning (MAS) spectra. Crystallographically inequivalent oxygen are now observable as distinct resonances in spectra of polycrystalline silicates such as diopside (CaMgSi{sub 2}{sup 17}O{sub 6}), wollastonite (CaSi{sup 17}O{sub 3}), larnite (Ca{sub 2}Si{sup 17}O{sub 4}), and forsterite (Mg{sub 2}Si{sup 17}O{sub 4}).

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5237548
• Journal Information: Journal of the American Chemical Society; (United States), Journal Name: Journal of the American Chemical Society; (United States) Vol. 113:1; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SILICATES
DATA
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
INFORMATION
ISOTOPES
LIGHT NUCLEI
MAGNESIUM COMPOUNDS
MAGNESIUM SILICATES
MAGNETIC RESONANCE
MEASURING METHODS
NUCLEAR MAGNETIC RESONANCE
NUCLEI
NUMERICAL DATA
OXYGEN 17
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
RESONANCE
SILICATES
SILICON COMPOUNDS
SOLIDS
STABLE ISOTOPES