Sorption of argon and xenon on the surface of minerals - Cosmochemical and geochemical consequences

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Argon, Cosmochemistry, Mineralogy, Sorption, Surface Reactions, Xenon, Gas-Solid Interactions, Geochemistry, Isotropic Media, Krypton, Van Der Waals Forces

Scientific paper

The sorption of argon, krypton and xenon on the clean surface of minerals, ground fine in a vacuum, was studied. It was determined that desorption of xenon occurs at high temperatures in comparison to that of argon, which is contained on the surface by Van der Waals forces. The preferential sorption of xenon on the surface of minerals, combined with the high-energy desorption activation may contribute to the processes responsible for the xenon deficit in the earth's atmosphere. Data on the isotropic composition of xenon and other inert gases in lunar rocks were analyzed, taking into account the differences in the character of their sorption and desorption. It was concluded that there exist primary xenon components different in isotropic composition in lunar materials.

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