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Pyrosulfate : ウィキペディア英語版
Pyrosulfate

In chemistry, disulfate or pyrosulfate is the anion with the molecular formula ()2. Disulfate is the IUPAC name.
It has a dichromate-like structure and can be visualised as two corner-sharing SO4 tetrahedra, with a bridging oxygen atom.〔"The crystal structure determination and refinements of K2S2O7, KNaS2O7 and Na2S2O7 from X-ray powder and single crystal diffraction data", Ståhl K, Balic-Zunic T, da Silva F, Eriksen K M, Berg R W, Fehrmann R ''Journal of Solid State Chemistry'' 178, 1697–1704, (2005) 〕
In this anion, sulfur has an oxidation state of +6. Disulfate is the conjugate base of the hydrogen disulfate (hydrogen pyrosulfate) ion HS2O7, which in turn is the conjugate base of disulfuric acid (pyrosulfuric acid).
==See also==

* Potassium pyrosulfate
* Sodium pyrosulfate
* Pyrophosphate

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