Article,
Volcanic origin of disulfur monoxide (S2O) on Io
Icarus, 133 (2): 293--297 (1998)
Abstract
We use chemical equilibrium calculations to model S2O formation by
high temperature thermochemical reactions in volcanic gases on Io,
The calculations predict formation of 1-6% S2O gas at observed hot
spot temperatures in SO2-S-2 gas mixtures at pressures of 1-100 bars
in volcanoes on Io, The S2O abundance increases with increasing pressure
(up to similar to 6% at 100 bars) and is relatively insensitive to
temperature and the bulk O/S ratio over wide ranges. Condensation
of volcanic S2O provides a plausible explanation for the solid S2O
that has been suggested to be present on Io's surface (e.g., around
the Pele volcano). (C) 1998 Academic Press.
