Sodium polonide

Sodium polonide
Preferred IUPAC name
Sodium polonide
Molar mass254.96 g/mol
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 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.


This salt may be produced from the reaction between aqueous hydrogen polonide 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]