Sodium polonide
| Sodium polonide | ||
|---|---|---|
| Sodium polonide | ||
| Properties | ||
| Molecular formula | Na2Po | |
| Molar mass | 254.96 g/mol | |
| Appearance | greyish[1] | |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | ||
| Infobox references | ||
Sodium polonide is a chemical compound with the formula Na2Po. It 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
Sodium polonide may be produced from the reaction between aqueous hydrogen polonide (hydropolonic acid) and sodium metal:[2][3]
- H2Po + 2 Na → Na2Po + H2
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. 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 0-08-022057-6.
- ↑ 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.
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