In chemistry, a plumbate often refers to compounds that can be viewed as derivatives of the hypothetical anion. The term also refers to any anion of lead or any salt thereof. So the term is vague and somewhat archaic.

Examples

Halides

Salts of , , , etc. are labeled as iodoplumbates. Lead perovskite semiconductors are often described as plumbates.

Lead oxyanions

Plumbates are formed by the reaction of

lead(IV) oxide Lead(IV) oxide is the inorganic compound with the formula PbO2. It is an oxide where lead is in an oxidation state of +4. It is a dark-brown solid which is insoluble in water. It exists in two crystalline forms. It has several important applicat ...

, , with alkali. Plumbate salts contain either the hydrated ''hexahydroxoplumbate(IV)'' or ''plumbate'' anion , or the

anhydrous A substance is anhydrous if it contains no water. Many processes in chemistry can be impeded by the presence of water; therefore, it is important that water-free reagents and techniques are used. In practice, however, it is very difficult to achi ...

anions (''meta-plumbate'') or (''ortho-plumbate''). For example, dissolving in a hot, concentrated

aqueous An aqueous solution is a solution in which the solvent is water. It is mostly shown in chemical equations by appending (aq) to the relevant chemical formula. For example, a solution of table salt, or sodium chloride (NaCl), in water would ...

solution of

potassium hydroxide Potassium hydroxide is an inorganic compound with the formula K OH, and is commonly called caustic potash. Along with sodium hydroxide (NaOH), KOH is a prototypical strong base. It has many industrial and niche applications, most of which expl ...

forms the potassium hexahydroxoplumbate(IV) salt . The anhydrous salts may be synthesized by heating metal oxides or hydroxides with . The most widely discussed plumbates are derivatives of barium plumbate . When doped with some bismuth in place of lead, the material exhibits superconductivity at 13 K. At the time of this discovery, oxides did not show such properties. The surprise associated with this work was eclipsed by the advent of the cuprate superconductors.

Binary lead oxides

Lead tetroxide ("red lead"), a mixed oxide with formula , may be thought of as lead(II) ortho-plumbate(IV), . Lead sesquioxide, , is also known, and has the structure lead(II) meta-plumbate(IV), .

References

External links

National Pollutant Inventory - Lead and Lead Compounds Fact Sheet
{{lead compounds Lead(IV) compounds Salts Oxyanions Oxometallates