Mathematics – Logic
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....7843m&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #7843
Mathematics
Logic
Scientific paper
Water has been present for the age of the Solar System at Jupiter and beyond and it has been present over long periods of time from Earth outward. H_2O and OH are found in primitive meteorites and reflectance spectra of some asteroids, Mars, and the Galilean Satellites show presence of H_2O or OH in minerals in addition to water ice. An increasing flow of reflectance spectra showing H_2O and OH features is expected from current or upcoming space mission instruments such as OMEGA, CRISM, VIMS, VIRTIS, and the DAWN, following the existing large Galileo NIMS data set. H_2O and OH spectral features can be complex and difficult to reproduce and interpret under terrestrial conditions, especially as they result from weak and complex bonds in minerals such as salts and clays that often are stable only under the cold, vacuum conditions of space at Mars and beyond. Following our reported on our studies of hydrated salts under Galilean satellite conditions, we report here on our recent work studying the spectra of hydrogen sulfate (sulfuric acid) hydrate and OH-bearing materials such as kaolinite under cryogenic conditions. This includes study of the 1.95 bands and the bands in the 2.5-3.0-μm region. Results include 1) several OH band positions do not change from room to cryogenic temperatures, making them more dependable for interpretation, 2) the possible use of several OH bands in geologically interesting materials in the 2.5-3.0 μm region for identification, 3) a comparison of the frozen H_2SO_4 hydrate with MgSO_4 hydrate and Europa and Ganymede spectra confirming that the H_2SO_4 1.95-μm band for frozen solutions is longer in wavelength than the Galilean satellite band under several experimental approaches.
Hansen Gary B.
Hibbitts Ch. A.
McCord Th. B.
Orlando Thomas M.
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