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Tarnished lead (left) and shiny lead (right) Compounds of lead exist with lead in two main oxidation states: +2 and +4. The former is more common. Inorganic lead(IV) compounds are typically strong oxidants or exist only in highly acidic solutions. [1] Red α-PbO and yellow β-PbO The mixed valence oxide Pb 3 O 4 Black PbO 2 which is a strong ...
Two polymorphs of lead chromate are known, orthorhombic and the more stable monoclinic form. Monoclinic lead chromate is used in paints under the name chrome yellow, and many other names. [2] Lead chromate adopts the monazite structure, meaning that the connectivity of the atoms is very similar to other compounds of the type MM'O 4. Pb(II) has ...
Related lead sulfochromate pigments are produced by the replacement of some chromate by sulfate, resulting in a mixed lead-chromate-sulfate compositions Pb(CrO 4) 1-x (SO 4) x. This replacement is possible because sulfate and chromate are isostructural.
Few inorganic lead(IV) compounds are known. They are only formed in highly oxidizing solutions and do not normally exist under standard conditions. [76] Lead(II) oxide gives a mixed oxide on further oxidation, Pb 3 O 4. It is described as lead(II,IV) oxide, or structurally 2PbO·PbO 2, and is the best-known mixed valence lead compound.
Lead(II,IV) oxide – Pb 3 O 4; Lead(IV) oxide – PbO 2; Lead(IV) sulfide – PbS 2; Lead hydrogen arsenate – PbHAsO 4; Lead styphnate – C 6 HN 3 O 8 Pb; Lead tetrachloride – PbCl 4; Lead tetrafluoride – PbF 4; Lead tetroxide – Pb 3 O 4 [205] Lead titanate – PbTiO 3; Lead zirconate titanate – Pb[Ti x Zr 1−x]O 3 (e.g., x = 0.52 ...
The lead-containing pigment chrome yellow was used for a very long time before environmental regulations discouraged its use. [7] When used as oxidizing agents or titrants in a redox chemical reaction , chromates and dichromates convert into trivalent chromium, Cr 3+ , salts of which typically have a distinctively different blue-green color.
Lead sesquioxide, Pb 2 O 3, which is a lead (II,IV) oxide as well (lead(II) metaplumbate(IV) [Pb 2+][PbO 2− 3]), reddish yellow Pb 12 O 19 , monoclinic, dark-brown or black crystals The so-called black lead oxide , which is a mixture of PbO and fine-powdered Pb metal and used in the production of lead–acid batteries .
Chromic acid has the hypothetical formula H 2 CrO 4. It is a vaguely described chemical, despite many well-defined chromates and dichromates being known. The dark red chromium(VI) oxide CrO 3, the acid anhydride of chromic acid, is sold industrially as "chromic acid". [21]