Sodium polonide is a radioactive chemical compound with the formula . This salt is a polonide, a set of very chemically stable compounds of polonium. Due to the difference in electronegativity (ÃÂEN) between sodium and polonium (â 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:
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 300âÂÂ400 ðC.
Like lithium polonide and potassium polonide, sodium polonide has the antifluorite structure.