Spectral reflectance properties of carbon-bearing materials

Details Spectral reflectance properties of carbon-bearing materials Spectral reflectance properties of carbon-bearing materials

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994icar..107..276c&link_type=abstract

Icarus, vol. 107, no. 2, p. 276-287

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Abundance, Carbides, Carbonaceous Materials, Chemical Composition, Crystal Structure, Infrared Spectra, Meteoritic Composition, Spectral Reflectance, Carbonaceous Chondrites, Grain Size, Macromolecules, Organic Materials, Photogeology, Polymorphism, Spectrum Analysis, Asteroids, Carbon, Spectral Properties, Reflectance, Optical Properties, Wavelength, Carbides, Organic Material, Laboratory Studies, Procedure, Spectra, Carbonaceous Material, Structure, Crystals, Geothermometry, Composition, Meteorites, Remot

Scientific paper

The 0.3-2.6 micrometers spectral reflectance properties of carbon polymorphs (graphite, carbon black, diamond), carbides (silicon carbide, cementite), and macromolecular organic-bearing materials (coal, coal tar extract, oil sand, oil shale) are found to vary from sample to sample and among groups. The carbon polymorphs are readily distinguishable on the basis of their visible-near infrared spectral slopes and shapes. The spectra of macromolecular organic-bearing materials show increases in reflectance toward longer wavelengths, exceeding the reflectance rise of more carbon-rich materials. Reflectance spectra of carbonaceous materials are affected by the crystal structure, composition, and degree of order/disorder of the samples. The characteristic spectral properties can potentially be exploited to identify individual carbonaceous grains in meteorites (as separates or in situ) or to conduct remote sensing geothermometry and identification of carbonaceous phases on asteroids.

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