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Raman spectroscopic study on NpO2 +–Ca2+ interaction in highly concentrated calcium chloride

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Abstract

Coordination circumstance of neptunyl ion in concentrated CaCl2 solutions was analyzed by Raman spectrometry. Besides the symmetric stretch (ν1) mode of NpO2 + and NpO2 2+, the asymmetric stretch (ν3) mode of NpO2 + was found. The Raman intensity of the ν3 mode increased with the concentration of CaCl2 in the system. This would be attributable to the cation–cation interaction between Np(V) and Ca(II).

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Acknowledgments

This research was partly supported by Grants-in-Aid for Scientific Research (No. 23760827) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

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Authors and Affiliations

  1. Research Reactor Institute, Kyoto University, 2-1010 Asashiro Nishi, Kumatori, Sennan, Osaka, 590-0494, Japan

    Toshiyuki Fujii, Akihiro Uehara & Hajimu Yamana

  2. Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan

    Yoshihiro Kitatsuji

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  1. Toshiyuki Fujii
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  2. Akihiro Uehara
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  3. Yoshihiro Kitatsuji
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  4. Hajimu Yamana
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Correspondence to Toshiyuki Fujii.

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Fujii, T., Uehara, A., Kitatsuji, Y. et al. Raman spectroscopic study on NpO2 +–Ca2+ interaction in highly concentrated calcium chloride. J Radioanal Nucl Chem 301, 293–296 (2014). https://doi.org/10.1007/s10967-014-3130-1

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  • DOI: https://doi.org/10.1007/s10967-014-3130-1

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