Accession Number : AD0655257
Title : SPECTRAL STUDIES OF MATERIALS POSSIBLY PRESENT ON THE MARTIAN SURFACE.
Descriptive Note : Final rept. no. 2, 1 Feb 66-31 Jan 67,
Corporate Author : TEXAS TECHNOLOGICAL COLL LUBBOCK DEPT OF CHEMISTRY
Personal Author(s) : Draper,Arthur L. ; Adamcik,Joe A.
Report Date : 01 JUN 1967
Pagination or Media Count : 13
Abstract : Comparing the reflectance spectra of synthetic mixtures with the observed spectrum of Mars has been continued to develop mixtures congruous with the Martian soil so that limits may be set on its composition. Mixtures containing various amounts of the iron oxides goethite and hematite precipitated on finely ground quartz and kaolin show the features of the Martian spectrum after the addition of dark materials such as magnetite or hornblende. The effect of temperature, particle size and iron oxide content on the spectra of the mixture components was examined. At low temperatures (-190C) spectral features are detectable. A synthetic material of particle size less than 37 microns is required to give a proper match to the Martian spectrum. The spectra of mixtures containing in the vicinity of 10% iron oxides do not seem to be highly sensitive to the total iron oxide content. (Author)
Descriptors : (*MARS(PLANET), *SOILS), SURFACE PROPERTIES, SPECTROSCOPY, IRON OXIDES, QUARTZ, CLAY MINERALS, MAGNETITE, TEMPERATURE, PARTICLE SIZE
Subject Categories : Astrophysics
Geology, Geochemistry and Mineralogy
Distribution Statement : APPROVED FOR PUBLIC RELEASE