Sinton Bands: Evidence for Deuterated Water on Mars

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Science  01 Jan 1965:
Vol. 147, Issue 3653, pp. 48-49
DOI: 10.1126/science.147.3653.48


The infrared absorption bands observed by Sinton at 2710, 2793, and 2898 cm-1, in the spectrum of Mars, may be due to gaseous D2O and HDO in the Martian atmosphere. The implication would be that the deuterium: hydrogen ratio exceeds that on Earth, presumably because of escape of the lighter gases from Mars, with accompanying gravitational fractionation of the hydrogen isotopes.