Articles | Volume 15, issue 4
https://doi.org/10.5194/tc-15-2001-2021
https://doi.org/10.5194/tc-15-2001-2021
Research article
 | 
23 Apr 2021
Research article |  | 23 Apr 2021

Interfacial supercooling and the precipitation of hydrohalite in frozen NaCl solutions as seen by X-ray absorption spectroscopy

Thorsten Bartels-Rausch, Xiangrui Kong, Fabrizio Orlando, Luca Artiglia, Astrid Waldner, Thomas Huthwelker, and Markus Ammann

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Cited articles

Abbatt, J. P. D., Thomas, J. L., Abrahamsson, K., Boxe, C., Granfors, A., Jones, A. E., King, M. D., Saiz-Lopez, A., Shepson, P. B., Sodeau, J., Toohey, D. W., Toubin, C., von Glasow, R., Wren, S. N., and Yang, X.: Halogen activation via interactions with environmental ice and snow in the polar lower troposphere and other regions, Atmos. Chem. Phys., 12, 6237–6271, https://doi.org/10.5194/acp-12-6237-2012, 2012. 
Alpert, P. A. and Knopf, D. A.: Analysis of isothermal and cooling-rate-dependent immersion freezing by a unifying stochastic ice nucleation model, Atmos. Chem. Phys., 16, 2083–2107, https://doi.org/10.5194/acp-16-2083-2016, 2016. 
Ammann, M., Artiglia, L., and Bartels-Rausch, T.: X-ray excited electron spectroscopy to study gas–liquid interfaces of atmospheric relevance, in: Physical chemistry of gas-liquid interfaces, Elsevier, 135–166, 2018. 
Antalek, M., Pace, E., Hedman, B., Hodgson, K. O., Chillemi, G., Benfatto, M., Sarangi, R., and Frank, P.: Solvation structure of the halides from x-ray absorption spectroscopy, J. Chem. Phys., 145, 044318, https://doi.org/10.1063/1.4959589, 2016. 
Aristov, Y. I., Di Marco, G., Tokarev, M. M., and Parmon, V. N.: Selective water sorbents for multiple applications, 3. CaCl2 solution confined in micro- and mesoporous silica gels: Pore size effect on the “solidification-melting” diagram, React. Kinet. Catal. Lett., 61, 147–154, https://doi.org/10.1007/BF02477527, 1997. 
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Short summary
Chemical reactions in sea salt embedded in coastal polar snow impact the composition and air quality of the atmosphere. Here, we investigate the phase changes of sodium chloride. This is of importance as chemical reactions proceed faster in liquid solutions compared to in solid salt and the precise precipitation temperature of sodium chloride is still under debate. We focus on the upper nanometres of sodium chloride–ice samples because of their role as a reactive interface in the environment.
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