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The Ca^(2+) and F^(-) ions arc located i...

The `Ca^(2+)` and `F^(-)` ions arc located in `CaF_(2)` crystal respectively at what position ? What is the charge ratio ?

A

FCC lattice , tetrahedral voids , 2 : 1

B

FCC lattice , half of tetrahedral voids , 1 : 2

C

BCC lattice , octahedral voids , 2 : 1

D

FCC lattice , half of octahedral voids , 1 : 2

Text Solution

Verified by Experts

The correct Answer is:
A
In `CaF_(2)`, the `Ca^(2+)` ions are present at all the corners and at the centre of each face of the cube. The `F^(-)` ions occupy the tetrahedral voids
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