A compound AB2 possesses the CaF2 type c...

A compound `AB_2` possesses the `CaF_2` type crystal structure. Write the coordination number of `A^(2+)` and `B^(-)` ions in its crystals.

A

4

B

6

C

8

D

3

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The correct Answer is:

C

In fluorite structure each `Ca^(2+)` ion is surrounded by eight `F^(-)` ions. Thus, the coordination number of `Ca^(2+)` is eight.

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