High-resolution 17 O NMR spectroscopy of wadsleyite ( β -Mg 2 SiO 4 )
Date
2003
Authors
Ashbrook, Sharon E
Berry, Andrew
Hibberson, William
Steuernagel, Stefan
Wimperis, Stephen
Journal Title
Journal ISSN
Volume Title
Publisher
American Chemical Society
Abstract
The sensitivity of high-resolution 17O (I = 5/2) NMR spectroscopy of solids has advanced significantly in recent years. Here, we show that excellent results are now obtainable from milligram quantities of 17O-enriched materials, thereby allowing the technique to be applied to silicate phases synthesized under very high pressures in a multiple-anvil apparatus. We report the first 17O NMR study of β-Mg2SiO4 (9.6 mg of 35% 17O-enriched material, synthesized at p = 16 GPa and T = 1873 K), a dense phase believed to have a significant role in the Earth's mantle. Using STMAS at magnetic fields of B0 = 9.4 and 11.7 T and MQMAS at B0 = 18.8 T, we have resolved and assigned all four crystallographically distinct O sites and determined their chemical shift and quadrupolar parameters.
Description
Keywords
Keywords: oxygen 17; article; crystallography; magnetic field; nuclear magnetic resonance spectroscopy; proton nuclear magnetic resonance; proton transport
Citation
Collections
Source
Journal of the American Chemical Society
Type
Journal article
Book Title
Entity type
Access Statement
License Rights
Restricted until
2037-12-31
Downloads
File
Description