In chemistry, a plumbate often refers to compounds that can be viewed as derivatives of the hypothetical PbO2−3 anion.
[3] Plumbates are formed by the reaction of lead(IV) oxide, PbO2, with alkali.
The anhydrous salts may be synthesized by heating metal oxides or hydroxides with PbO2.
The most widely discussed plumbates are derivatives of barium metaplumbate BaPbO3.
When doped with some bismuth in place of lead, the material BaPb0.95Bi0.05O3 exhibits superconductivity at 13 K.[6] At the time of this discovery, oxides did not show such properties.