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Question

Formulae of various silicates are given in left column. Match them with their type.

A
Ortho silicates
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B
Pyro silicates
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C
Cyclic silicates
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D
2D-sheet silicates
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Solution

Ortho silicates are discrete units of silicates. They have a formula of SiO44.


Pyro silicates are formed when two silicate units share one oxygen atom. Their formula is Si2O67 .

Cyclic silicates are formed when each silicate unit shares two of its oxygen atoms with two adjacent silicon units respectively. Their formula is (Si2O3)2nn.


When three of oxgen atoms present in a silicate unit are shared with other silicate units, 2D-sheet silicates are formed. They have the formula (Si2O5)2nn .


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