High-resolution 17O NMR spectroscopy of wadsleyite (β-Mg2SiO4)

Sharon E. Ashbrook; Andrew J. Berry; William O. Hibberson; Stefan Steuernagel; Stephen Wimperis

doi:10.1021/ja036777k

High-resolution ¹⁷O NMR spectroscopy of wadsleyite (β-Mg₂SiO₄)

Sharon E. Ashbrook, Andrew J. Berry, William O. Hibberson, Stefan Steuernagel, Stephen Wimperis^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

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.

Original language	English
Pages (from-to)	11824-11825
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	125
Issue number	39
DOIs	https://doi.org/10.1021/ja036777k
Publication status	Published - 1 Oct 2003

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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.",

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AU - Ashbrook, Sharon E.

AU - Berry, Andrew J.

AU - Hibberson, William O.

AU - Steuernagel, Stefan

AU - Wimperis, Stephen

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AB - 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.

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High-resolution ¹⁷O NMR spectroscopy of wadsleyite (β-Mg₂SiO₄)

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