If the crystallises in zinc blende structure with `I^-` ions at lattice points. What fraction of tetrahedral voids is occupied by `Ag^+` ions ?

Options

A. 0.25
B. 0.5
C. 1
D. 0.75

Answer

B

Explanation

In AgI crystal, number of `Ag^(+)` ions is equal to `I^(-)` ions. However, the number of tetrahedral voids are twice the number of atoms forming the cubic lattice.
`therefore` Number of tetrahedral voids occupied by `Ag^(+)` ion.
= 50 %