Chemistry:Polonium sulfide
| Names | |
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| Other names
Polonium monosulfide[1]
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| Identifiers | |
3D model (JSmol)
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| Properties | |
| PoS | |
| Molar mass | 241.07 g/mol |
| Appearance | Black crystals |
| Melting point | 500 °C (932 °F; 773 K) |
| Insoluble[2] | |
| Related compounds | |
Related compounds
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Chromium(III) sulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Polonium sulfide is an inorganic compound of polonium and sulfur with the chemical formula PoS.[3] The compound is radioactive and forms black crystals.[4][5]
Synthesis
1. Passing hydrogen sulfide through an acidic solution of a polonium(II) salt:[6][7]
- [math]\ce{ PoCl2 + H2S -> PoS + 2HCl }[/math]
2. Reaction of ammonium sulfide aqueous solution with polonium(II) hydroxide:
- [math]\ce{ (NH4)2S + Po(OH)2 -> 2NH3 + 2H2O + PoS }[/math]
Physical properties
Polonium sulfide forms black solid crystals, insoluble in water, ammonium sulfide, ethanol, acetone, or toluene.
Chemical properties
Polonium sulfide has strong reducing properties and can be oxidized by chlorine water, bromine water, sodium hypochlorite, and aqua regia. Polonium sulfide is also unstable to heating. It decomposes into elemental polonium and elemental sulfur when heated to 274.85°C in a vacuum:[8]
- [math]\ce{ PoS -> Po + S }[/math]
Reacts with concentrated acids:
- [math]\ce{ PoS + 2HCl -> PoCl2 + H2S }[/math]
Applications
Used in the isolation and purification of polonium.
References
- ↑ "polonium | Definition, Symbol, Properties, Uses, & Facts" (in en). https://www.britannica.com/science/polonium.
- ↑ Schweitzer, George K.; Pesterfield, Lester L. (14 January 2010) (in en). The Aqueous Chemistry of the Elements. Oxford University Press. p. 243. ISBN 978-0-19-539335-4. https://books.google.com/books?id=-oI8DwAAQBAJ&dq=Polonium+sulfide+PoS&pg=PA243.
- ↑ Macintyre, Jane E. (23 July 1992) (in en). Dictionary of Inorganic Compounds. CRC Press. p. 3779. ISBN 978-0-412-30120-9. https://books.google.com/books?id=9eJvoNCSCRMC&dq=Polonium+sulfide+PoS&pg=PA3779. Retrieved 2 November 2021.
- ↑ Sergeevа, V. I.; Stepanova, N. Yu.; Savenko, A. V.; Sapozhnikov, Yu. A. (2015). "Use of Iron Sulfide for Removing Polonium from Liquid Radioactive Waste". Radiochemistry 57 (5): 534–536. doi:10.1134/S1066362215050148. https://istina.msu.ru/download/10702342/1gdyYu:rGRfA8vK1MsZtub1PT_rZq-gIYY/. Retrieved 2 November 2021.
- ↑ "Polonium - an overview | ScienceDirect Topics". sciencedirect.com. https://www.sciencedirect.com/topics/chemistry/polonium.
- ↑ Wiberg, Egon; Holleman, A. F.; Wiberg, Nils (2001) (in en). Inorganic Chemistry. Academic Press. p. 594. ISBN 978-0-12-352651-9. https://books.google.com/books?id=Mtth5g59dEIC&dq=Polonium+sulfide+PoS&pg=PA594. Retrieved 2 November 2021.
- ↑ Considine, Douglas M.; Considine, Glenn D. (11 December 2013) (in en). Van Nostrand's Scientific Encyclopedia. Springer Science & Business Media. p. 2503. ISBN 978-1-4757-6918-0. https://books.google.com/books?id=t4jjBwAAQBAJ&dq=Polonium+sulfide+PoS&pg=PA2503. Retrieved 2 November 2021.
- ↑ Brown, Susan A.; Brown, Paul L. (25 September 2019) (in en). The Aqueous Chemistry of Polonium and the Practical Application of its Thermochemistry. Elsevier. p. 10. ISBN 978-0-12-819309-9. https://books.google.com/books?id=eTqvDwAAQBAJ&dq=Polonium+sulfide+PoS&pg=PA10. Retrieved 2 November 2021.
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