SILICATES

About 95% of the earth's crust is composed of silicate minerals, alumino silicate clay r silica. Silicates are classified on the basis of bonding and the metal ions present in them. Some of the common categories of silicates are (I) orthosilicates , (II) pyrosilicates (III) cyclic silicates , (IV) chain silicates (V) amphiboles , (VI) sheet silicates (VII) three-dimensional network silicates What is true regarding a double chain silicate 'Amphiboles' ?

A silicate anion in a mineral is a linear chain of three silicate tetrahedral units that share at corners. The silicate mineral contains A^(2+) " and " B^(2+) ions. The formula of that mineral is

Siliceous skeleton of diatoms is known as

Siliceous walls are present in ……………………. .

Aqueous solution of Sodium silicate is

Spodumene is the silicate mineral of ___________