Question

what are silicates explain different types of silicates

it's for 5 marks ​

Answer 1

In short, silicates are minerals that have silica (SiO2) as a main component within their molecular structure.

There are different groups of minerals, such as oxides, hydroxides, and silicates. Oxides have oxygen (O) as the main anion within the molecule that makes up the mineral. Hydroxides have water (or at least OH) as the main anion, while silicates have silica as the main anion.

It may help to give some examples. Magnetite is an oxide (Fe3O4), rust is an hydroxide (FeO(OH), Fe(OH)3). In these examples the Iron is the cation and the O or OH is the anion. Silicates are minerals where the anion is silica (SiO2), such as olivine ((Fe,Mg)2 SiO4) or clays such as kaolinite (Al2Si2O5(OH)4), which is classified as a hydrated silicate. In its pure form, silica can be found as quartz.

Silicate minerals can be further subdivided by which metals are acting as cations, as well as the amount of oxygen and hydroxide. Unsurprisingly, silicates make up the bulk of the minerals so far identified..

types of silicate..

Ortho silicates (or Neso silicates)

Pyro silicate (or Soro silicates)

Cyclic silicates (or Ring silicates)

Chain silicates (or pyroxenes)

Double chain silicates (or amphiboles)

Sheet or phyllo silicates

Three dimensional (or tecto silicates)

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