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Lead(IV) oxide, commonly known as lead dioxide, is an inorganic compound with the chemical formula PbO 2.It is an oxide where lead is in an oxidation state of +4. [1] It is a dark-brown solid which is insoluble in water. [2]
Lead oxides are a group of inorganic compounds with formulas including lead (Pb) and oxygen (O).. Common lead oxides include: Lead(II) oxide, PbO, litharge (red), massicot (yellow)
Lead(II) oxide, also called lead monoxide, is the inorganic compound with the molecular formula Pb O.PbO occurs in two polymorphs: litharge having a tetragonal crystal structure, and massicot having an orthorhombic crystal structure.
[6] The dioxide may be prepared by, for example, halogenization of lead(II) salts. The alpha allotrope is rhombohedral, and the beta allotrope is tetragonal. [6] Both allotropes are black-brown in color and always contain some water, which cannot be removed, as heating also causes decomposition (to PbO and Pb 3 O 4). The dioxide is a powerful ...
Lead(II,IV) oxide, also called red lead or minium, is the inorganic compound with the formula Pb 3 O 4.A bright red or orange solid, it is used as pigment, in the manufacture of batteries, and rustproof primer paints.
The names "caffeine" and "3,7-dihydro-1,3,7-trimethyl-1H-purine-2,6-dione" both signify the same chemical compound. The systematic name encodes the structure and composition of the caffeine molecule in some detail, and provides an unambiguous reference to this compound, whereas the name "caffeine" simply names it.
Careful hydrolysis of lead(II) acetate solution yields a crystalline product with a formula 6PbO·2H 2 O or Pb 6 O 4 (OH) 4. [4] This material is a cluster compound, consisting of an octahedron of Pb centers, each face of which is capped by an oxide or a hydroxide. The structure is reminiscent of the Mo 6 S 8 subunit of the Chevrel phases. [5]
As well as an anhydrous form, a monohydrate (PbC 2 O 4 •H 2 O), [5] a dihydrate (PbC 2 O 4 •2H 2 O) and a trihydrate (PbC 2 O 4 •3H 2 O) are known. The dihydrate is from the orthorhombic crystal system, with space group Pnam (number 62), with unit cell dimensions: a = 9.053 Å b = 8.036 Å and c = 7.834 Å.