Which of the following statement are correct for the ionic solids in which positive and negative ions are held by strong electrostatic attractive forces ?

Options

A. The radius `r^(+)//r^(-)` increases as coordination number increases
B. As the difference in size of ions increases, coordination number increases
C. When coordination number is eight, the `r^(+)//r^(-)` ratio lies between 0.225 to 0.414
D. In ionic solid of the type AX(ZnS, Wurtzite) the coordination number of `Zn^(2+)` and `S^(2-)` respectively are 4 and 4.

Answer

C

Explanation

Properties of ionic solid