The -SiH vibrational stretch as an indicator of the oxidation state of silicon in a cometary or asteroidal regolith

Details The -SiH vibrational stretch as an indicator of the oxidation state of silicon in a cometary or asteroidal regolith The -SiH vibrational stretch as an indicator of the oxidation state of silicon in a cometary or asteroidal regolith

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992icar...98..207n&link_type=abstract

Icarus (ISSN 0019-1035), vol. 98, no. 2, Aug. 1992, p. 207-210. Research supported by National Research Council, National Academ

Computer Science

9

Asteroids, Comet Nuclei, Oxidation, Regolith, Silicon Compounds, Vibrational Spectra, Grain Size, Hydrides, Oxidation-Reduction Reactions, Solar Wind, Spectrum Analysis

Scientific paper

It has been experimentally shown that the position of the -SiH fundamental vibrational stretch is very sensitive to the chemical environment surrounding the Si atom. Si in an oxidizing environment will display an -SiH feature near 4.4 microns, whereas Si in a reducing grain could be responsible for a feature at 4.74 microns. It is further shown that, as an oxidized grain is reduced, the -SiH fundamental shifts to longer wavelengths through a series of intermediate bands.

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