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Phase behavior of light gas mixtures at high pressures

Published online by Cambridge University Press:  14 August 2015

William B. Streett
William B. Streett*
Affiliation:
Science Research Laboratory and Department of Chemistry, U.S. Military Academy, West Point, N.Y., U.S.A.

Abstract

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If solid surfaces exist beneath the visible clouds of the major planets, they may be expected to exist at depths and pressures at which the component gas mixtures solidify under their own weight. The elucidation of phase behavior in mixtures of light gases at very high pressures is therefore essential to the solution of the problem of deep atmosphere structures in these planets. Available experimental evidence suggests several possible extrapolations of the H2-He phase diagram to high pressures. These have been used to develop a structural model for a H2-He atmosphere. In this model, gravitational separation of coexisting phases results in a layered structure, and it is shown that masses of H2-rich solid can exist in dynamic and thermodynamic equilibrium with a fluid layer of equal density but higher He content. This model forms the basis of a new hypothesis for Jupiter's Red Spot.

Type
Part III: Outer Planets
Information
Symposium - International Astronomical Union , Volume 40: Planetary Atmospheres , 1971 , pp. 363 - 370
Copyright
Copyright © Reidel 1971 

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