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magic-angle spinning

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Journal Article
Published: 01 December 1998
American Mineralogist (1998) 83 (11-12_Part_1): 1285–1292.
... shock pressures of 12-20 GPa show a broadening of the 29 Si NMR peak and the development of asymmetry toward lower NMR frequency (indicating an increase in the mean Si-O-Si intertetrahedral bond angle). NMR spectra of samples shock compressed above approximately 25 GPa show increasing amounts...
Journal Article
Published: 01 October 1992
Clays and Clay Minerals (1992) 40 (5): 561–566.
Journal Article
Published: 01 February 1992
American Mineralogist (1992) 77 (1-2): 44–52.
...Roberta Lauren Millard; Ronald C. Peterson; Brian K. Hunter Abstract The disorder of Mg 2+ and Al 3+ cations between the tetrahedral and octahedral sites in MgAl 2 O 4 spinel has been determined by 27 Al magic-angle spinning (MAS) NMR spectroscopy for synthetic powders quenched from temperatures...
Journal Article
Published: 01 December 1987
American Mineralogist (1987) 72 (11-12): 1195–1203.
Journal Article
Published: 01 December 1987
The Canadian Mineralogist (1987) 25 (4): 717–730.
Journal Article
Published: 01 February 1986
Clays and Clay Minerals (1986) 34 (1): 99–102.
Journal Article
Journal: Clay Minerals
Published: 01 September 1985
Clay Minerals (1985) 20 (3): 327–334.
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(A)  25 Mg solid-state <span class="search-highlight">magic</span>-<span class="search-highlight">angle</span> <span class="search-highlight">spinning</span> nuclear magnetic resonance (NMR...
Published: 24 June 2021
Figure 2. (A) 25 Mg solid-state magic-angle spinning nuclear magnetic resonance (NMR) spectra of dolomite powder at 14.1 T upon grinding. (B) Variation in relative intensity of Mg environments corresponding to CaMg(CO 3 ) 2 (black) and MgO (red) following grinding. (C) Thermogravimetry and (D
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27 Al <span class="search-highlight">magic</span> <span class="search-highlight">angle</span> <span class="search-highlight">spinning</span> nuclear magnetic resonance spectra for Fe-free a...
Published: 01 April 2021
Figure 7. 27 Al magic angle spinning nuclear magnetic resonance spectra for Fe-free allophanes and imogolite. Spectra have been vertically offset for clarity.
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29 Si <span class="search-highlight">magic</span> <span class="search-highlight">angle</span> <span class="search-highlight">spinning</span> nuclear magnetic resonance spectra for Fe-free a...
Published: 01 April 2021
Figure 8. 29 Si magic angle spinning nuclear magnetic resonance spectra for Fe-free allophanes and imogolite. Spectra have been vertically offset for clarity.
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<span class="search-highlight">Magic</span> <span class="search-highlight">angle</span> <span class="search-highlight">spinning</span>  207 Pb-NMR of polycrystalline mimetite, Pb 5 (AsO 4 )...
Published: 01 April 2021
Figure 3. Magic angle spinning 207 Pb-NMR of polycrystalline mimetite, Pb 5 (AsO 4 ) 3 Cl, at 20 kHz spinning speed, with the isotropic bands for Wyckoff position 6 h (–2074 ppm) and 4 f (–2124 ppm) indicated by arrows. The spectrum was acquired in a magnetic field of B → 0
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Representative  13 C{ 1 H} cross-polarization <span class="search-highlight">magic</span>-<span class="search-highlight">angle</span> <span class="search-highlight">spinning</span> nuclear ...
Published: 29 June 2017
Figure 2. Representative 13 C{ 1 H} cross-polarization magic-angle spinning nuclear magnetic resonance (CPMAS-NMR) spectra derived from ooid sample from Butterfly Beach (BBeach), Bahamas. Chemical shifts are represented in ppm downfield from standard tetramethylsilane. A: CPMAS spectrum
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Quantitative  13 C direct polarization (DP) with <span class="search-highlight">magic</span>-<span class="search-highlight">angle</span>-<span class="search-highlight">spinning</span> (MAS)...
Published: 01 March 2013
Figure 1 Quantitative 13 C direct polarization (DP) with magic-angle-spinning (MAS) nuclear magnetic resonance spectra (thin lines) and DP–MAS spectra after recoupled dipolar dephasing showing nonprotonated carbons plus mobile moieties, such as methyl groups (thick lines). (A) Oil shale, (B
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Carbon-13 direct polarization with <span class="search-highlight">magic</span>-<span class="search-highlight">angle</span>-<span class="search-highlight">spinning</span> nuclear magnetic re...
Published: 01 March 2013
Figure 2 Carbon-13 direct polarization with magic-angle-spinning nuclear magnetic resonance spectra of oil shale using a recycle delay of 20 s (A) and 1 s (B). Chemical shift is reported in parts per million (ppm).
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Cross-polarization <span class="search-highlight">magic</span> <span class="search-highlight">angle</span> <span class="search-highlight">spinning</span>  15 N nuclear magnetic resonance sp...
Published: 01 August 2009
F ig . 3. Cross-polarization magic angle spinning 15 N nuclear magnetic resonance spectra of (a) 15 N-amino-labeled 2-aminobenzothiazole (ABT), (b) 15 N-thiazole-labeled acetyl-ABT, (c) twofold-labeled benzoyl-ABT, (d) 15 N-amino-labeled ABT-hydrochloride, (e) the adduct of twofold-labeled
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Cross-polarization <span class="search-highlight">magic</span> <span class="search-highlight">angle</span> <span class="search-highlight">spinning</span>  15 N nuclear magnetic resonance sp...
Published: 01 August 2009
F ig . 4. Cross-polarization magic angle spinning 15 N nuclear magnetic resonance spectra of (a) the humic acid reaction product with 15 N-thiazole-labeled 2-aminobenzothiazole (ABT) and the deconvoluted spectrum, (b) humic acid with laccase, and (c) 15 N-thiazole-labeled ABT (* = spinning
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Cross-polarization <span class="search-highlight">magic</span> <span class="search-highlight">angle</span> <span class="search-highlight">spinning</span>  15 N nuclear magnetic resonance sp...
Published: 01 August 2009
F ig . 2. Cross-polarization magic angle spinning 15 N nuclear magnetic resonance spectra of (a) the humic acid reaction product with 15 N-amino-labeled 2-aminobenzothiazole (ABT) and the deconvoluted spectrum, (b) humic acid with laccase, and (c) 15 N-amino-labeled ABT (* = spinning side
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Cross-polarization <span class="search-highlight">magic</span> <span class="search-highlight">angle</span> <span class="search-highlight">spinning</span>  15 N nuclear magnetic resonance sp...
Published: 01 August 2009
F ig . 5. Cross-polarization magic angle spinning 15 N nuclear magnetic resonance spectra of (a) 15 N-thiazole-labeled 2-aminobenzothiazole (ABT), (b) 15 N-thiazole-labeled acetyl-ABT, (c) twofold-labeled benzoyl-ABT, (d) 15 N-thiazole-labeled ABT-hydrochloride, (e) the adduct of twofold
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( A ) Triple-quantum <span class="search-highlight">magic</span>-<span class="search-highlight">angle</span> <span class="search-highlight">spinning</span>  17 O NMR spectra (9.4 Tesla fiel...
Published: 01 October 2006
FIGURE 2 ( A ) Triple-quantum magic-angle spinning 17 O NMR spectra (9.4 Tesla field) of NaAlSiO 4 glasses prepared with different cooling rates and thus different fictive temperatures. Blue boxes show peaks for different bridging oxygen species. Intensities for the Al-O-Al and Si-O-Si peaks
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( A ) Triple-quantum <span class="search-highlight">magic</span>-<span class="search-highlight">angle</span> <span class="search-highlight">spinning</span>  17 O NMR spectra (9.4 Tesla fiel...
Published: 01 October 2006
FIGURE 2 ( A ) Triple-quantum magic-angle spinning 17 O NMR spectra (9.4 Tesla field) of NaAlSiO 4 glasses prepared with different cooling rates and thus different fictive temperatures. Blue boxes show peaks for different bridging oxygen species. Intensities for the Al-O-Al and Si-O-Si peaks