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 Agl crystals , number of `Ag^+` ions are 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^+` ions = 50%