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Science. 1969 Nov 28;166(3909):1141-2.

Mars: is the surface colored by carbon suboxide?


The reflection spectrum of Mars can be well matched from 0.2 through 1.6 microns (and farther) by polymers of carbon suboxide, reflection spectra for which have now been measured. We propose that the reddish color of Mars might be attributed to carbon suboxide, not the commonly considered limonite or other iron-bearing minerals.

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