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

In a cubic close-packed structure of a mixed oxide one-eighth of tetrahedral voids are occupied by divalent ions X^(2+) while one half of the octahedral voids are occupied by trivalent ions Y^(3+) . What is the formula of the compound?

Show that in a cubic close packed structure, eight tetrahedral voids are present per unit cell.

Two metals showing cubic close packed (ccp) structure are_____and_____

Number of tetrahedral sites in a close packed crystal is -

Aluminium crystallises in a cubic closed packed structure. Its metallic radius is 125 pm. (i) What is the length of the side of the unit cell? (ii) How many unit cells are there in 1.00 cm^3 of aluminium?

Ferric oxide crystallises in a hexagonal close packed array of oxide ions with two out of every three octahedral holes occupied by ferric ions. Derive the formula of the ferric oxide.