In CsCl structure, the coordination number of `Cs^(+)` is

Options

A. Equal to that of `Cl^(-)` that is 6
B. Equal to that of `Cl^(-)`, that is 8
C. Not equal to that of `Cl^(-)`, that is 6
D. Not equal to that of `Cl^(-)`, that is 8

Answer

B

Explanation

Each `Cs^(+)` ion touches 8 corner `Cl^(-)` ions, so the C.N. no. of `Cs^(+)` is equal to 8. Each `Cl^(-)` ion (say at X) touches 4 cells in its own layer and 4 cells in the above layer. So this `Cl^(-)` ion can touch `8Cs^(+)` ions present at the body centres of 8 cells. So the C.N. no. of `Cl^(-)` ion is also equal to 8 .