SPECTRAL STUDIES OF MATERIALS POSSIBLY PRESENT ON THE MARTIAN SURFACE.
Final rept. no. 1, 1 Feb 65-31 Jan 66,
TEXAS TECHNOLOGICAL COLL LUBBOCK DEPT OF CHEMISTRY
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Comparisons of the reflectance spectra of synthetic mixtures have been made with the observed spectrum of Mars in an effort to develop a mixture congruous with the Martian soil. Mixtures containing various amounts of the iron oxides geothite and hematite as the coloring material show the features of the Martian spectrum, particularly when the gethite and hematite are precipitated on finely ground quartz and kaolin. However, such mixtures are much more reflective than the planet. To date, two promising mixtures have been made, one prepared by the addition of the dark material magnetite, the other by the addition of the dark mineral hornblende. The spectra of these two mixtures closely match the spectrum of Mars in the visible region and bracket it in the infrared. Author