Potassium polonide is a chemical compound with the formula K2Po. It is a polonide, a set of very chemically stable compounds of polonium.[2][3]

Potassium polonide

Crystal structure of potassium polonide
__ K+     __ Po2-
Names
Preferred IUPAC name
Potassium polonide
Identifiers
3D model (JSmol)
  • InChI=1S/2K.Po/q2*+1;-2
    Key: NUJFXRJXZUAAQT-UHFFFAOYSA-N
  • [K+].[K+].[Po-2]
Properties
K2Po
Molar mass 287.18 g/mol
Appearance greyish[1]
Related compounds
Other anions
Potassium oxide
Potassium sulfide
Potassium selenide
Potassium telluride
Other cations
Lithium polonide
Sodium polonide
Rubidium polonide
Caesium polonide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Characteristics

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Potassium polonide is thermally more unstable and has stronger electron affinity than potassium telluride (K2Te).[2][3]

Production

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Potassium polonide may be produced from a redox reaction between polonium hydride and potassium metal:[2][3]

H2Po + 2 K → K2Po + H2

It may also be produced by heating potassium and polonium together at 300–400 °C.[1] At higher temperature, this reaction may reverse.

Crystal structure

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Like sodium polonide, potassium polonide has the antifluorite structure.[2][3]

References

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  1. ^ a b Bagnall, K. W. (1962). "The Chemistry of Polonium". Advances in Inorganic Chemistry and Radiochemistry. New York: Academic Press. pp. 197–230. ISBN 9780120236046. Retrieved June 17, 2012.
  2. ^ a b c d Greenwood, Norman N.; Earnshaw, Alan (1984). Chemistry of the Elements. Oxford: Pergamon Press. p. 899. ISBN 978-0-08-022057-4.
  3. ^ a b c d Moyer, Harvey V. (1956), "Chemical Properties of Polonium", in Moyer, Harvey V. (ed.), Polonium, Oak Ridge, Tenn.: United States Atomic Energy Commission, pp. 33–96, doi:10.2172/4367751, TID-5221