Metasilicate

Metasilicates are silicates containing ions of empirical formula SiO²⁻
₃. Common stoichiometries include M^I
₂SiO₃ and M^IISiO₃. Metasilicates can be cyclic, usually the hexamer (SiO₃)12−6 or chains (SiO₃)n²⁻.[1]

Idealized structure of sodium metasilicate.

Common compounds containing metasilicate anion are:

Pyroxene (diopside) is a mineral classified as a metasilicate.

References

Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.

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[1] Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.