AgI crystallises in cubic close packed ZnS structure. What fraction of tetrahedral sites is occupied of Ag^+ ions ?

AgI crystallises in cubic close packed ZnS structure. What fraction of

1.	AgI crystallises in cubic close packed ZnS structure. What fraction of tetrahedral sites is occupied of Ag^+ ions ?
Answer» <html><body><p></p>Solution :In the face-centred unit cell of <a href="https://interviewquestions.tuteehub.com/tag/agi-362325" style="font-weight:bold;" target="_blank" title="Click to know more about AGI">AGI</a>, there are `4 Ag^+` ions and `4 I^-` ions. As there are `4 I^-` ions in the <a href="https://interviewquestions.tuteehub.com/tag/packing-1145400" style="font-weight:bold;" target="_blank" title="Click to know more about PACKING">PACKING</a>. Therefore, there are eight tetrahedral <a href="https://interviewquestions.tuteehub.com/tag/voids-1447686" style="font-weight:bold;" target="_blank" title="Click to know more about VOIDS">VOIDS</a>. Of these , half are occupied by silver cations.</body></html>