Polonium tetraiodide

Polonium tetraiodide
Names
Other names
Polonium(IV) iodide
Identifiers
3D model (JSmol)
  • InChI=1S/4HI.Po/h4*1H;/p-4
    Key: DHKHYWWHNZXEQM-UHFFFAOYSA-J
  • [I-].[I-].[I-].[I-].[Po]
Properties
PoI
4[1]
Molar mass 716.6 g/mol
Appearance Black crystals
Melting point 200 °C (392 °F; 473 K)
Insoluble[2]
Related compounds
Related compounds
 Chromium(III) sulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Polonium tetraiodide is a binary inorganic compound of polonium and iodine with the chemical formula PoI
4.[3][4] The compound forms volatile black crystals. [5]

Synthesis

1. Action of iodine vapor on polonium metal:

2. Dissolution of polonium dioxide in hydroiodic acid:[6]

Properties

Physical properties

The compound forms black crystals that are insoluble in water.

Chemical properties

The compound reacts with hydroiodic acid to form hexaiodopolonic acid:

It can be reduced by hydrogen sulfide to yield polonium metal.[5] It decomposes on heating.

References

  1. ^ Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3510. ISBN 978-0-412-30120-9. Retrieved 2 November 2021.
  2. ^ Schweitzer, George K.; Pesterfield, Lester L. (14 January 2010). The Aqueous Chemistry of the Elements. Oxford University Press. p. 134. ISBN 978-0-19-539335-4. Retrieved 2 November 2021.
  3. ^ Brown, Susan A.; Brown, Paul L. (25 September 2019). The Aqueous Chemistry of Polonium and the Practical Application of its Thermochemistry. Elsevier. p. 24. ISBN 978-0-12-819309-9. Retrieved 2 November 2021.
  4. ^ Schmidt, M.; Siebert, W.; Bagnall, K.W. (2013). The Chemistry of Sulphur, Selenium, Tellurium and Polonium: Pergamon Texts in Inorganic Chemistry. Elsevier. pp. 961–962. ISBN 978-1483158655.
  5. ^ a b K. W. Bagnall, R. W. M. D'Eye, J. H. Freeman (1956). "657. The polonium halides. Part III. Polonium tetraiodide". Journal of the Chemical Society (Resumed). J. Chem. Soc.: 3385–3389. doi:10.1039/JR9560003385.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  6. ^ M. Schmidt, W. Siebert, K. W. Bagnall (2013). The Chemistry of Sulphur, Selenium, Tellurium and Polonium: Pergamon Texts in Inorganic Chemistry. Elsevier. pp. 961–962. ISBN 978-1483158655.{{cite book}}: CS1 maint: multiple names: authors list (link)