Potassium polonide

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title: "Potassium polonide" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["polonides", "potassium-compounds", "fluorite-crystal-structure"] topic_path: "general/polonides" source: "https://en.wikipedia.org/wiki/Potassium_polonide" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

| ImageFile =CaF2_polyhedra.png | ImageCaption = Crystal structure of potassium polonide __ K+ __ Po2- | PIN = Potassium polonide |Section1 = {{Chembox Identifiers | SMILES = [K+].[K+].[Po-2] | StdInChI=1S/2K.Po/q2*+1;-2 | StdInChIKey=NUJFXRJXZUAAQT-UHFFFAOYSA-N |Section2 = {{Chembox Properties | Formula = K2Po | MolarMass = 287.18 g/mol | Appearance = greyish | Section3 = {{Chembox Related | OtherAnions = Potassium oxide Potassium sulfide Potassium selenide Potassium telluride | OtherCations = Lithium polonide Sodium polonide Rubidium polonide Caesium polonide Potassium polonide is a chemical compound with the formula K2Po. It is a polonide, a set of very chemically stable compounds of polonium.

Characteristics

Potassium polonide is thermally more unstable and has stronger electron affinity than potassium telluride (K2Te).

Production

Potassium polonide may be produced from a redox reaction between polonium hydride and potassium metal:

:H2Po + 2 K → K2Po + H2

It may also be produced by heating potassium and polonium together at 300–400 °C. At higher temperature, this reaction may reverse.

Crystal structure

Like sodium polonide, potassium polonide has the antifluorite structure.

References

(1962). "Advances in Inorganic Chemistry and Radiochemistry". [[Academic Press]].
{{Greenwood&Earnshaw1st
Moyer, Harvey V.. (1956). "Polonium". United States Atomic Energy Commission.

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