Physics
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..119b&link_type=abstract
Lunar and Planetary Science, volume 27, page 119
Physics
Hematite, Mars, Mixtures, Montmorillonite, Reflectance Spectroscopy
Scientific paper
Visible to near-infrared bi-directional reflectance spectra have been measured for several mixtures of fine-grained hematite powder and chemically-treated montmorillonites. The purpose of this study is to measure the influence of a highly absorbing, fine-grained material on the spectral properties, especially NIR brightness and 2.2 m band depth, of silicate-bearing Mars analogs. Chemically- treated montmorillonites, containing ~10-20 wt.% nanophase ferric minerals and a NIR spectral brightness of ~85%, are used here as the Mars soil analog materials. The hematite powder was found to significantly darken the NIR albedo of the silicate and greatly decrease the strength of the 2.2 m band. The environmental conditions at the time of sample measurement were also observed to influence the near-infrared spectral properties of these Mars analog materials.
Bishop Janice L.
Dummel Andreas
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