Chemical properties of positive singly charged astatine ion in aqueous solution

  • M. Milanov
  • V. Doberenz
  • V. A. Khalkin
  • A. Marinov


The 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 aquacomplex [(H2O)xAt]+ (x=1–2) (protonated hypoastatic acid). Deprotonation constant of this cation is Kdp=0.032±0.005. Specific properties of the astatine cation are given. They can be explained, probably, through the peculiarities of its structure.


Hydrogen Physical Chemistry Migration Aqueous Solution Inorganic Chemistry 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    VAN FUTZUN, Yu. V. NORSEEV, V. A. KHALKIN, Chao TATONAN, Radiokhimiya, 5 (1963) 351.Google Scholar
  2. 2.
    DO KIM TYUNG, I. DDOVA, V. A. KHALKIN, Radiokhimiya, 15 (1973) 548.Google Scholar
  3. 3.
    W. A. CHALKIN, E. HERRMANN, Isotopenpraxis, 11 (1975) 333.Google Scholar
  4. 4.
    YU. V., NORSEEV, V. A. KHALKIN, CHAO TAONAN, Izv. Sib. Otd. Akad. Nauk SSSR, Ser. Khim. Nauk, 11 (1965) 25.Google Scholar
  5. 5.
    VAN FUTZUN, YU. V. NORSEEV, V. A. KHALKIN in: Coprecipitation and Adsorption of Radioactive Elements, Nauka, Leningrad, 1965, p. 80.Google Scholar
  6. 6.
    YU. V. NORSEEV, CHAO TAONAN, V. A. KHALKIN, Radiokhimiya, 8 (1966) 497.Google Scholar
  7. 7.
    M. BOCHVAROVA, DO KIM TYUNG, V. A. KHALKIN, Anal. Khim., 24 (1970) 890.Google Scholar
  8. 8.
    W. A. CHALKIN, E. HERRMANN, J. V., NORSEEV, I. DRAYER, Chem. Zeitung, 101 (1977) 470.Google Scholar
  9. 9.
    M. DE PUZ, J. Chem. Phys., 52 (1970) 3362.CrossRefGoogle Scholar
  10. 10.
    M. JEDINAKOVA, J. CELEDA, Coll. Czech. Chem. Comm., 36 (1971) 3071.Google Scholar
  11. 11.
    R. P. BELL, E. GELLS, J. Chem. Soc., (1951) 2734.Google Scholar
  12. 12.
    K. N. MISHCHENKO, N. E. FLIS, Zh. Prikl. Khim., 30 (1957 665.Google Scholar
  13. 13.
    DONG DYK NHAN, M. MILANOV, V. DOBERENZ, R. DRAYER, YU. V. NORSEEV, V. A. KHALKIN, JINR R6-82-93, Dubna, 1982.Google Scholar
  14. 14.
    M. MILANOV, V. DOBERENZ, R. DRAYER, M. NOAK, V. A. KHALKIN, JINR R6-81-410, Dubna, 1981.Google Scholar

Copyright information

© Akadémiai Kiadó 1984

Authors and Affiliations

  • M. Milanov
    • 1
  • V. Doberenz
    • 1
  • V. A. Khalkin
    • 1
  • A. Marinov
    • 1
  1. 1.Joint Institute for Nuclear ResearchDubna(USSR)

Personalised recommendations