Sulfur in vacuum - Sublimation effects on frozen melts, and applications to Io's surface and torus

Details Sulfur in vacuum - Sublimation effects on frozen melts, and applications to Io's surface and torus Sulfur in vacuum - Sublimation effects on frozen melts, and applications to Io's surface and torus

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...72....1n&link_type=abstract

Icarus (ISSN 0019-1035), vol. 72, Oct. 1987, p. 1-34.

Computer Science

20

Crystal Structure, Io, Sublimation, Sulfur, Thermal Vacuum Tests, Vacuum, Albedo, Color, Microstructure, Reflectance, Satellite Atmospheres, Satellite Surfaces, Jupiter, Sulfur, Sublimation, Satellites, Surface, Laboratory Studies, Io, Plasma Torus, Texture, Color, Thickness, Freezing, Temperature, Reflectance, Vacuum Effects, Reflectivity, Wavelengths, Pressure, Age, Parameters, Experiments, Volcanism, Models, Crystallization, Spectra, Cooling, Thermal History, Flux, Photographs, Electron Microscopy, Sem

Scientific paper

The author has found from laboratory experiments that vacuum sublimation has a profound effect on the molecular composition, microtexture, bulk density (porosity), and the UV/visible spectral reflectance of the surface of solid sulfur samples, both when the sulfur is in the form of frozen or quenched melts and as laboratory-grade sulfur powder. These sublimation effects produce a unique surface material, the understanding of which may have important implications for deciphering the many enigmatic optical and textural properties of the surface of Jupiter's satellite Io. This planetary body is thought to have a surface greatly enriched in volcanically produced elemental sulfur and sulfur compounds and to have a surface atmospheric pressure with an upper limit of ≡10-7atm, comparable to a good laboratory vacuum, and surface hotspots at temperatures of about 300K covering about 0.3% of its global surface.

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