Polonium tetraiodide is a binary inorganic compound of polonium and iodine with the chemical formula PoI4. The compound forms volatile black crystals.
Synthesis
1. Action of iodine vapor on polonium metal:
Po + 2 I2 → PoI42. Dissolution of polonium dioxide in hydroiodic acid:4
PoO2 + 4 HI → PoI4 + 2 H2OProperties
Physical properties
The compound forms black crystals that are insoluble in water.
Chemical properties
The compound reacts with hydroiodic acid to form hexaiodopolonic acid:
PoI4 + 2 HI → H2[PoI6]It can be reduced by hydrogen sulfide to yield polonium metal.5 It decomposes on heating.
References
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. 978-0-12-819309-9 ↩
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. 978-1483158655 ↩
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) /wiki/J._Chem._Soc. ↩
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) 978-1483158655 ↩
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) /wiki/J._Chem._Soc. ↩