Evidence That the Reactivity of the Martian Soil Is Due to Superoxide Ions

Details Evidence That the Reactivity of the Martian Soil Is Due to Superoxide Ions Evidence That the Reactivity of the Martian Soil Is Due to Superoxide Ions

Sep 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000sci...289.1909y&link_type=abstract

Science, Volume 289, Issue 5486, pp. 1909-1912 (2000).

Computer Science

73

Scientific paper

The Viking Landers were unable to detect evidence of life on Mars but, instead, found a chemically reactive soil capable of decomposing organic molecules. This reactivity was attributed to the presence of one or more as-yet-unidentified inorganic superoxides or peroxides in the martian soil. Using electron paramagnetic resonance spectroscopy, we show that superoxide radical ions (O2^{-) form directly on Mars-analog mineral surfaces exposed to ultraviolet radiation under a simulated martian atmosphere. These oxygen radicals can explain the reactive nature of the soil and the apparent absence of organic material at the martian surface.}

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