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The phosphotungstate anion, an example of a polyoxometalate. In chemistry, a polyoxometalate (abbreviated POM) is a polyatomic ion, usually an anion, that consists of three or more transition metal oxyanions linked together by shared oxygen atoms to form closed 3-dimensional frameworks.
Polyatomic ions often are useful in the context of acid–base chemistry and in the formation of salts. Often, a polyatomic ion can be considered as the conjugate acid or base of a neutral molecule. For example, the conjugate base of sulfuric acid (H 2 SO 4) is the polyatomic hydrogen sulfate anion (HSO − 4).
An iodate is the polyatomic anion with the formula IO − 3. It is the most common form of iodine in nature, as it comprises the major iodine-containing ores. [1] Iodate salts are often colorless. They are the salts of iodic acid.
A ring anion, the cyclic Al 6 O 18− 18 anion, found in tricalcium aluminate, Ca 3 Al 2 O 6, which can be considered to consist of 6 corner sharing {AlO 4} tetrahedra. [5] A number of infinite chain anions in the compounds Na 7 Al 3 O 8 which contains rings linked to form chains, Na 7 Al 13 O 10 and Na 17 Al 5 O 16 which contain discrete chain ...
This is sometimes the case when multiple atoms of the same type surround the central atom, and is especially common for polyatomic ions. When this situation occurs, the molecule's Lewis structure is said to be a resonance structure, and the molecule exists as a resonance hybrid. Each of the different possibilities is superimposed on the others ...
The orthogermanate anion In chemistry, germanate is a compound containing an oxyanion of germanium . In the naming of inorganic compounds it is a suffix that indicates a polyatomic anion with a central germanium atom, [ 1 ] for example potassium hexafluorogermanate, K 2 GeF 6 .
Structure of the orthosilicate anion SiO 4− 4. A silicate is any member of a family of polyatomic anions consisting of silicon and oxygen, usually with the general formula [SiO (4-2x)− 4−x] n, where 0 ≤ x < 2. The family includes orthosilicate SiO 4− 4 (x = 0), metasilicate SiO 2− 3 (x = 1), and pyrosilicate Si 2 O 6− 7 (x = 0.5 ...
In chemistry, azide (/ ˈ eɪ z aɪ d /, AY-zyd) is a linear, polyatomic anion with the formula N − 3 and structure − N=N + =N −. It is the conjugate base of hydrazoic acid HN 3. Organic azides are organic compounds with the formula RN 3, containing the azide functional group. [1] The dominant application of azides is as a propellant in ...