Fourier transform infrared spectroscopic spectroscopic studies of low temperature polar stratospheric cloud model surfaces

Stefan Peil; Otto Schrems

doi:10.1117/12.166747

31 January 1994 Fourier transform infrared spectroscopic studies of low temperature polar stratospheric cloud model surfaces

Stefan Peil, Otto Schrems

Author Affiliations +

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166747
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

Abstract

Thin films of different crystalline nitric acid hydrates have been prepared at low temperatures and studied by means of FTIR-spectroscopy. The hydrates of HNO₃ have been prepared in various ways: (1) codeposition of HNO₃ and H₂O from the vapor phase onto the sample support in the temperature range between -110 degree(s)C and -90 degree(s)C yields two modifications of nitric acid trihydrate (NAT), (alpha) - and (beta) -NAT. (2) reactions between H₂O (ice) and N₂O₅ (solid) or N₂O₅ (solid) and H₂O (gas) in the same temperature range produce nitric acid in the hydrated forms (alpha) -NAT or (beta) -NAT.

Citation Download Citation

Stefan Peil and Otto Schrems "Fourier transform infrared spectroscopic studies of low temperature polar stratospheric cloud model surfaces", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166747

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