Detection of high-pressure silica polymorphs in whole-rock samples from a meteor crater, Arizona, impact sample using solid-state silicon-29 nuclear magnetic resonance spectroscopy

Details Detection of high-pressure silica polymorphs in whole-rock samples from a meteor crater, Arizona, impact sample using solid-state silicon-29 nuclear magnetic resonance spectroscopy Detection of high-pressure silica polymorphs in whole-rock samples from a meteor crater, Arizona, impact sample using solid-state silicon-29 nuclear magnetic resonance spectroscopy

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986metic..21..117y&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 21, March 31, 1986, p. 117-124.

Computer Science

9

Impact Melts, Meteorite Craters, Meteoritic Composition, Nuclear Magnetic Resonance, Polymorphism, Silicon Dioxide, Arizona, Coesite, High Pressure, Samples, Silicon Isotopes, Solid State, Spectroscopy, Stishovite, Meteorites, Samples, Meteorite, Silica, Barringer Crater, Arizona, Nmr, Impacts, Spectroscopy, Polymorphism, Coesite, Stishovite, Procedure, Element Ratios, Techniques, Simulations, Spectra

Scientific paper

High-resolution solid-state silicon-29 nuclear magnetic resonance spectroscopy using "magic-angle" sample-spinning can readily detect the presence of the high pressure silica polymorphs coesite and stishovite in whole-rock samples from a Meteor Crater Arizona, impact sample, and yields accurate coesite/stishovite ratios. Such determinations are being carried out by partially suppressing (saturating) intense quartz signals (which have long spinlattice relaxation times) by means of short experimental recycle-times. This method enhances the signal-to-noise ratios of coesite and stishovite (which have relatively short spin-lattice relaxation times). For the sample examined, the coesite/stishovite ratio is about 27.

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