Francium compounds
Francium compounds are compounds containing the element
Halides
Francium halides are all soluble in water and are expected to be white solids. They are expected to be produced by the reaction of the corresponding
vapour pressure of the compound, although francium fluoride would have a higher vapour pressure.[3]
Other compounds
Francium nitrate, sulfate, hydroxide, carbonate, acetate, and oxalate are all soluble in water, while the
covalent character than its lighter congeners; this is attributed to the 6p electrons in francium being more involved in the francium–oxygen bonding.[4] The relativistic destabilisation of the 6p3/2 spinor may make francium compounds in oxidation states higher than +1 possible, such as [FrVF6]−; but this has not been experimentally confirmed.[5] Francium perchlorate is produced by the reaction of francium chloride and sodium perchlorate. The francium perchlorate coprecipitates with caesium perchlorate.[2] This coprecipitation can be used to isolate francium, by adapting the radiocaesium coprecipitation method of Lawrence E. Glendenin and C. M. Nelson. However, this method is unreliable in separating thallium, which also coprecipitates with caesium.[2] Francium perchlorate's entropy is expected to be 42.7 e.u[3]
(178.7 J mol−1 K−1).
The only double salt known of francium has the formula Fr9Bi2I9.[dubious ]
See also
- Caesium compounds
- Radium compounds
References
- S2CID 95854270.
- ^ a b c E. N K. Hyde Radiochemistry of Francium, Subcommittee on Radiochemistry, National Academy of Sciences-National Research Council; available from the Office of Technical Services, Dept. of Commerce, 1960.
- ^ ISBN 978-0-250-39923-9.
- ISBN 978-1-4020-9975-5.
- . Retrieved 16 November 2022.