Chemical properties of positive singly charged astatine ion in aqueous solution

@article{Milanov1984ChemicalPO,
  title={Chemical properties of positive singly charged astatine ion in aqueous solution},
  author={M. Milanov and V. Doberenz and V. Khalkin and A. Marinov},
  journal={Journal of Radioanalytical and Nuclear Chemistry},
  year={1984},
  volume={83},
  pages={291-299}
}
AbstractThe mobility of oxidized astatine in solutions H(Na)ClO4 (μ=0.4 M) − 1·10−4M K2Cr2O7 has been measured at 25°C in the interval 0.63≤pH≤1.68. Under these conditions astatine migrates to the cathode only. The speed of the migration depends upon the concentration of hydrogen ions in solution: pH 1.68 Uc = 1.17 · 10-4 cm2 V-1 s-1 pH 0.63 Uc = 2.67 · 10-4 cm2 V-1 s-1 The effect agrees with the opinion that the singly charged cation of astatine formed in acidic solutions is a strong… Expand
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References

SHOWING 1-3 OF 3 REFERENCES
Study of the H+ and OH− Hydrated Ions by the CNDO/2 Method
The ions obtained by hydration of H+ and OH−, e.g., H3O+, H5O2, H7O3, H9O4+, H3O2−, H5O3−, and H7O4− have been studied theoretically using the CNDO/2 method. The results indicate chain structures areExpand