Plumbate
Template:Short description Script error: No such module "about". In chemistry, a plumbate often refers to compounds that can be viewed as derivatives of the hypothetical Template:Chem2 anion.
Examples
Halides
Salts of Template:Chem2, Template:Chem2, Template:Chem2, etc. are labeled as iodoplumbates.[1][2] Lead perovskite semiconductors are often described as plumbates.[3]
Lead oxyanions
Plumbates are formed by the reaction of lead(IV) oxide, Template:Chem2, with alkali.[4][5] Plumbate salts contain either the hydrated hexahydroxoplumbate(IV) or plumbate anion Template:Chem2, or the anhydrous anions Template:Chem2 (metaplumbate) or Template:Chem2 (orthoplumbate).[4] For example, dissolving Template:Chem2 in a hot, concentrated aqueous solution of potassium hydroxide forms the potassium hexahydroxoplumbate(IV) salt Template:Chem2. The anhydrous salts may be synthesized by heating metal oxides or hydroxides with Template:Chem2.
The most widely discussed plumbates are derivatives of barium metaplumbate Template:Chem2. When doped with some bismuth in place of lead, the material Template:Chem2 exhibits superconductivity at 13 K.[6] 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 Template:Chem2 (red), may be thought of as lead(II) orthoplumbate(IV), Template:Chem2. Lead sesquioxide, Template:Chem2, is also known (reddish yellow), and has the structure of lead(II) metaplumbate(IV), Template:Chem2.[4]
References
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