Plumbate

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 hydrated hexahydroxoplumbate(IV) or plumbate anion , or the anhydrous anions (metaplumbate) or (orthoplumbate). For example, dissolving in a hot, concentrated aqueous solution of potassium hydroxide 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 metaplumbate . 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 valence-mixed oxide with formula (red), may be thought of as lead(II) orthoplumbate(IV), . Lead sesquioxide, , is also known (reddish yellow), and has the structure of lead(II) metaplumbate(IV), .

References

References

1. (2001). "Synthesis and Crystal Structures of Iodoplumbate Chains, Ribbons and Rods with New Structural Types". Journal of the Chemical Society, Dalton Transactions.
2. (1995). "[Pb18I44]8−–An Iodoplumbate with an Unusual Structure". Angewandte Chemie International Edition in English.
3. (2016). "Organohalide Lead Perovskites for Photovoltaic Applications". The Journal of Physical Chemistry Letters.
4. (1939). "Inorganic Syntheses".
5. (2001). "Inorganic chemistry". Academic Press.
6. (1975). "High-Temperature Superconductivity in the BaPb_1−xBi_xO₃ Systems". Solid State Communications.