Polonide
![A space-filling representation of the crystal structure of magnesium polonide: Mg2+ ions are shown in green, while Po2− ions are shown in brown.](/Images/godic/202502/03/Magnesium-polonide-xtal-1960-3D-SF3009.png")
A polonide is a chemical compound of the radioactive element polonium with any element less electronegative than polonium. Polonides are usually prepared by a direct reaction between the elements at temperatures of around 300–400 °C. They are amongst the most chemically stable compounds of polonium, and can be divided into two broad groups: