Volcanic Origin of Disulfur Monoxide (S_2O) on Io

Details Volcanic Origin of Disulfur Monoxide (S_2O) on Io Volcanic Origin of Disulfur Monoxide (S_2O) on Io

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998icar..133..293z&link_type=abstract

Icarus, Volume 133, Issue 2, pp. 293-297.

Physics

22

Scientific paper

We use chemical equilibrium calculations to model S_2O formation by high temperature thermochemical reactions in volcanic gases on Io. The calculations predict formation of 1-6% S_2O gas at observed hot spot temperatures in SO_2-S_2 gas mixtures at pressures of 1-100 bars in volcanoes on Io. The S_2O abundance increases with increasing pressure (up to ~6% at 100 bars) and is relatively insensitive to temperature and the bulk O/S ratio over wide ranges. Condensation of volcanic S_2O provides a plausible explanation for the solid S_2O that has been suggested to be present on Io's surface (e.g., around the Pele volcano).

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