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Structural and Phase Transitions on Water Ice Surface Under HCl Exposure: Implication for Stratosphere Conditions

Author

Listed:
  • N. M. Persiantseva

    (Department of Microelectronics, Moscow State University, Russia)

  • O. B. Popovicheva

    (Department of Microelectronics, Moscow State University, Russia)

  • T. V. Rakhimova

    (Department of Microelectronics, Moscow State University, Russia)

Abstract

The HCl-ice interaction has been investigated over a wide HCl pressure range of10-7–10-4Torr and ice temperatures 150–240 K. The Three characteristic values for HCl uptake efficiency were obtained which indicate the change of phase state and structure of the ice surface at increasing HCl pressure. The low valueγ ≈ 0.1 ± 0.02corresponds to HCl vapor interaction with pure ice and is realized at the atmosphere conditions. The valueγ ≈ 0.5 ± 0.1indicates the formation of hexahydrate HCl •6H2Owith increase of HCl pressure. And the largest value ofγ ≈ 0.8 ± 0.1is observed at appearance of liquid or amorphous solid 4:1H2O:HCl.The HCl uptake kinetics is analyzed. The flow of HCl molecules from the ice surface into the bulk is shown to play an important role in the redistribution of HCl molecules. It defines a low surface concentration of the adsorbed HCl molecules under stratospher condition at early times of interaction.

Suggested Citation

  • N. M. Persiantseva & O. B. Popovicheva & T. V. Rakhimova, 1998. "Structural and Phase Transitions on Water Ice Surface Under HCl Exposure: Implication for Stratosphere Conditions," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 5(01), pages 437-441.
    • Handle: RePEc:wsi:srlxxx:v:05:y:1998:i:01:n:s0218625x98000815
    DOI: 10.1142/S0218625X98000815
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