Journal
CHEMICAL PHYSICS LETTERS
Volume 357, Issue 5-6, Pages 403-408Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0009-2614(02)00520-1
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A significantly reduced experiment time for half-integer nuclei with long T-1 relaxation times has been demonstrated by Si-29 CPMG-MAS or O-17 QCPMG-MAS experiments on alpha-cristobalite, a radiation damaged Zircon and O-17 enriched alpha-quartz, respectively. For Si-29 up to 37 h were saved compared to the MAS experiment using longer recycle periods (up to 3600 s) but fewer scans. The spectrum reconstructed from the echoes provides similar spectral information as the MAS spectrum. In the O-17 spectrum increased sensitivity facilitated determination of CSA in alpha-quartz at 9.4 T and points towards a method to obtain natural abundance O-17 spectra of non-cubic oxides. (C) 2002 Elsevier Science B.V. All rights reserved.
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