noun, plural: fluosilicates
A salt of fluosilicic acid
A fluosilicate refers to any salts of fluosilicic acid. It is also defined as a salt containing the anion SiF62- derived from fluosilicic acid (also called hexafluorosilicic acid). The hexafluorosilicic acid is an inorganic compound with a chemical formula of (H3O)2SiF6. It is a colorless liquid with a sour taste and a pungent smell. It occurs naturally (in volcanoes) and artificially, especially for industrial purposes.
An example of a salt derived from fluosilicic acid is sodium fluosilicate. It is also called sodium hexafluorosilicate. It has a chemical formula of Na2 SiF6. One way of producing sodium fluosilicate is by neutralizing fluosilicic acid with sodium chloride. This compound is used as additives for water fluoridation, as an antiseptic, and as deodorant.
Another example is ammonium fluosilicate (also called ammonium fluorosilicate). It has a chemical formula of (NH4)2SiF6. It occurs naturally as bararite. It occurs at the fumaroles of volcanoes and in burning piles of anthracite. Ammonium fluosilicate is synthesized for use as a disinfectant, metal casting, and electroplating.
Fluosilicic acid and the salts derived from it are all toxic compounds and poisonous.1
1 Wiberg, E., Wiberg, N., and Holleman, A.F. (2001). Inorganic chemistry. Academic Press, San Diego.