Chemistry:Sodium polonide
 Crystal structure of sodium polonide
__ Na+ __ Po2- | |
| Names | |
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| Preferred IUPAC name
Sodium polonide | |
| Identifiers | |
3D model (JSmol)
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| Properties | |
| Na 2Po | |
| Molar mass | 254.96 g/mol |
| Appearance | greyish[1] |
| Related compounds | |
Other anions
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Other cations
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Sodium polonide is a radioactive chemical compound with the formula Na
2Po. This salt is a polonide, a set of very chemically stable compounds of polonium.[2][3] Due to the difference in electronegativity (ΔEN) between sodium and polonium (≈ 1.1 under the Pauling system) and the slight non-metallic character of polonium, it is intermediate between intermetallic phases and ionic compounds.
Production
This salt may be produced from the reaction between aqueous hydrogen polonide and sodium metal:[2][3]
- H
2Po + 2 Na → Na
2Po + H
2
This method of synthesis is hampered by the chemical instability of hydrogen polonide.
Sodium polonide may also be produced by heating sodium and polonium together at 300–400 °C.[1]
Crystal structure
Like lithium polonide and potassium polonide, sodium polonide has the antifluorite structure.[2][3]
References
- ↑ 1.0 1.1 Bagnall, K. W. (1962). "The Chemistry of Polonium". Advances in Inorganic Chemistry and Radiochemistry. New York: Academic Press. pp. 197–230. ISBN 9780120236046. https://books.google.com/books?id=8qePsa3V8GQC. Retrieved June 17, 2012.
- ↑ 2.0 2.1 2.2 Greenwood, Norman N.; Earnshaw, Alan (1984). Chemistry of the Elements. Oxford: Pergamon Press. p. 899. ISBN 978-0-08-022057-4. https://books.google.com/books?id=OezvAAAAMAAJ&q=0-08-022057-6&dq=0-08-022057-6&source=bl&ots=m4tIRxdwSk&sig=XQTTjw5EN9n5z62JB3d0vaUEn0Y&hl=en&sa=X&ei=UoAWUN7-EM6ziQfyxIDoCQ&ved=0CD8Q6AEwBA.
- ↑ 3.0 3.1 3.2 Moyer, Harvey V. (1956), "Chemical Properties of Polonium", in Moyer, Harvey V., Polonium, Oak Ridge, Tenn.: United States Atomic Energy Commission, pp. 33–96, doi:10.2172/4367751, TID-5221, http://www.osti.gov/bridge/servlets/purl/4367751-nEJIbm/.
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