Editing Francium (section)

===Other compounds===
Francium nitrate, sulfate, hydroxide, carbonate, acetate, and oxalate, are all soluble in water, while the [[iodate]], [[picrate]], [[tartrate]], [[Chloroplatinic acid|chloroplatinate]], and [[silicotungstate]] are insoluble. The insolubility of these compounds are used to extract francium from other radioactive products, such as [[zirconium]], [[niobium]], [[molybdenum]], [[tin]], [[antimony]], the method mentioned in the section above.<ref name="L&P" /> Francium oxide is believed to disproportionate to the peroxide and francium metal.<ref>{{cite report|page=9|id=UCRL-409|url=https://escholarship.org/uc/item/8056g18b|title=Low Mass Francium and Emanation Isotopes of High Alpha Stability|first1=E.&nbsp;K.|last1=Hyde|first2=A.|last2=Ghiorso|author-link2=Albert Ghiorso|first3=G.&nbsp;T.|last3=Seaborg|author-link3=Glenn Seaborg|date=10 Oct 1949|location=Berkeley, CA|institution=[[UC Radiation Laboratory]]}}</ref>  The CsFr molecule is predicted to have the heavier element (francium) at the negative end of the dipole, unlike all known heterodiatomic alkali metal molecules. Francium [[superoxide]] (FrO<sub>2</sub>) is expected to have a more [[covalent]] character than its lighter [[congener (chemistry)|congeners]]; this is attributed to the 6p electrons in francium being more involved in the francium–oxygen bonding.<ref name="Thayer" /> The relativistic destabilisation of the 6p<sub>3/2</sub> spinor may make francium compounds in oxidation states higher than +1 possible, such as [Fr<sup>V</sup>F<sub>6</sub>]<sup>−</sup>; but this has not been experimentally confirmed.<ref>{{cite journal |last1=Cao |first1=Chang-Su |last2=Hu |first2=Han-Shi |last3=Schwarz |first3=W. H. Eugen |last4=Li |first4=Jun |date=2022 |title=Periodic Law of Chemistry Overturns for Superheavy Elements |type=preprint |url=https://chemrxiv.org/engage/chemrxiv/article-details/63730be974b7b6d84cfdda35 |journal=[[ChemRxiv]] |volume= |issue= |pages= |doi=10.26434/chemrxiv-2022-l798p |access-date=16 November 2022}}</ref>