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Radio Brightness Contrasts of Aqueous Solutions of Alkali Metal Nitrates in the Millimeter Spectral Range

  • PHYSICAL CHEMISTRY OF SOLUTIONS
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Abstract

Using a high-sensitivity radiometer at a frequency of 61.2 GHz (millimeter spectral range), the radio brightness characteristics of aqueous solutions of alkali metal nitrates (Li+, Na+, K+, Cs+) have been studied under laboratory conditions. Radio brightness effects of different sign have been observed for solutions with weakly hydrated (Cs+, K+) and more strongly hydrated (Li+, Na+) ions. The radio brightness parameters have been compared with calculated data from dielectric spectra in the millimeter range. It has been shown that the radiation of solutions is associated with dipole and ion hydration contributions to the dielectric loss, and the latter should be considered even in the millimeter range. For the studied systems, agreement between the experimental and calculated radio brightness parameters in the initial concentration range has been demonstrated.

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Funding

The work was supported by the Ministry of Education and Science of the Russian Federation in the framework of the State assignment of IGIC RAS and partially supported by the Russian foundation of Basic Research (project no. 19-03-00033a).

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Authors and Affiliations

  1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia

    A. K. Lyashchenko, A. Yu. Efimov & V. S. Dunyashev

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  1. A. K. Lyashchenko
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  2. A. Yu. Efimov
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  3. V. S. Dunyashev
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Correspondence to A. K. Lyashchenko.

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Translated by G. Kirakosyan

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Lyashchenko, A.K., Efimov, A.Y. & Dunyashev, V.S. Radio Brightness Contrasts of Aqueous Solutions of Alkali Metal Nitrates in the Millimeter Spectral Range. Russ. J. Inorg. Chem. 67, 519–523 (2022). https://doi.org/10.1134/S003602362204012X

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