Pyrosilicate

Pyrosilicate anion
Names
IUPAC name
Pyrosilicate
Other names
disilicate, diorthosilicate
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
326578
  • InChI=1S/O7Si2/c1-8(2,3)7-9(4,5)6/q-6 Y
    Key: KUDCBYUNCUYIDU-UHFFFAOYSA-N Y
  • [O-][Si]([O-])([O-])O[Si]([O-])([O-])[O-]
Properties
O7Si2−6
Molar mass 168.166 g·mol−1
Conjugate acid Pyrosilicic acid
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N (what is YN ?)
Infobox references

A pyrosilicate is a type of chemical compound; either an ionic compound that contains the pyrosilicate anion Si
2O6−
7, or an organic compound with the hexavalent ≡O
3Si-O-SiO
3≡ group. The anion is also called disilicate or diorthosilicate.

Ionic pyrosilicates can be considered salts of the unstable pyrosilicic acid, H
6Si
2O
7. Unlike the acid, the salts can be stable. Indeed, pyrosilicates occur widely in nature as a class of silicate minerals, specifically the sorosilicates - though some sorosilicate minerals, such as gehlenite, replace one of the silicon atoms with tetracoordinated aluminium or boron, giving the isostructural anions AlSiO7−7 and BSiO7−7.

Some notable synthetic pyrosilicates include

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