Mathematics – Logic
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980natur.285..647b&link_type=abstract
Nature, vol. 285, June 26, 1980, p. 647.
Mathematics
Logic
10
Iron Compounds, Mars Surface, Planetary Composition, Chemical Reactions, Color, Surface Reactions, Viking Lander Spacecraft, Mars, Feroxyhyte, Colors, Maghaemite, Viking Lander, Physical Properties, Infrared, Spectrum, Comparisons, Iron Oxide, Minerals, Formation, Reduction, Oxidation, Magnetic Properties, Chemistry
Scientific paper
The physical, chemical and paragenetic properties of delta-FeOOH in the form of the mineral feroxyhyte are discussed in relation to the possible composition of the red-brown surface coating of Mars. It is pointed out that the deep-brown ferromagnetic FeOOH polymorph will adhere to magnets such as those on the Viking Lander at Mars ambient temperatures and exhibits spectral maxima in the range 2.95-3.4 m similar to those observed in remote sensing spectra of Mars. The redox properties of the formation of feroxyhyte are shown to be compatible with postulated processes on the Martian surface, and with the results of some of the Viking biological experiments. It is thus concluded that feroxyhyte has the magnetic, chemisorption, spectral, redox and paragenetic properties to suggest its consideration as a possible component of the Martian surface.
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