Computer Science
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982plap.nasa...27l&link_type=abstract
In its Planetary Atmospheres Program p 27-35 (SEE N82-22112 12-88)
Computer Science
Aluminum Chlorides, Antimony Compounds, Arsenic Compounds, Chemical Clouds, Halides, Venus Atmosphere, Geochemistry, Planetary Evolution, Thermodynamic Properties
Scientific paper
Several Venus cloud condensates, including A12C16 as well as halides, oxides and sulfides of arsenic and antimony, are assessed for their thermodynamic and geochemical plausibility. Aluminum chloride can confidently be ruled out, and condensation of arsenic sulfides on the surface will cause arsenic compounds to be too rare to produce the observed clouds. Antimony may conceivably be sufficiently volatile, but the expected molecular form is gaseous SbS, not the chloride. Arsenic and antimony compounds in the atmosphere will be regulated at very low levels by sulfide precipitation, irrespective of the planetary inventory of As and Sb. Thus the arguments for a volatile-deficient origin for Venus based on the depletion of water and mercury (relative to Earth) cannot be tested by a search for atmospheric arsenic or antimony.
Fegley Bruce Jr.
Lewis Scott J.
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