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 | |
Na2Po | |
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).
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Sodium polonide is a radioactive chemical compound with the formula Na2 Po. 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.
This salt may be produced from the reaction between aqueous polonium hydride and sodium metal: [2] [3]
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]
Like lithium polonide and potassium polonide, sodium polonide has the antifluorite structure. [2] [3]