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, , with alkali. Plumbate salts contain either the

hydrate In chemistry, a hydrate is a substance that contains water or its constituent elements. The chemical state of the water varies widely between different classes of hydrates, some of which were so labeled before their chemical structure was underst ...

d ''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 achie ...

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 be ...

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 exploi ...

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 Barium is a chemical element with the symbol Ba and atomic number 56. It is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Because of its high chemical reactivity, barium is never found in nature as a free element. The ...

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 superconductor Cuprate superconductors are a family of high-temperature superconducting materials made of layers of copper oxides (CuO2) alternating with layers of other metal oxides, which act as charge reservoirs. At ambient pressure, cuprate superconducto ...

Binary lead oxides

Lead tetroxide Lead(II,IV) oxide, also called red lead or minium, is the inorganic compound with the formula Pb3O4. A bright red or orange solid, it is used as pigment, in the manufacture of batteries, and rustproof primer paints. It is an example of a mixed ...

("red lead"), a mixed oxide with formula , may be thought of as lead(II) ortho-plumbate(IV), . Lead

sesquioxide A sesquioxide is an oxide of an element (or radical), where the ratio between the number of atoms of that element and the number of atoms of oxygen is 2:3. For example, aluminium oxide and phosphorus(III) oxide are sesquioxides. Many sesquioxi ...

, , 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