(i) 4 tetrahedral voids each of which is shared by four adjacent unit cells.
(ii) 4 tetrahedral voids within the unit cell.
(iii) 8 tetrahedral voids each of them which are shared by four adjacent unit cells.
(iv) 8 tetrahedral voids within the unit cells.
Correct Answer: (iv) 8 tetrahedral voids within the unit cells.
Explanation: The smallest group of atoms represents the perfect balance of crystals and through cell units the whole cube is made up of three times the size of a cube. Cubic closed packaging is like a fcc structure.
Number of tetrahedral voids = 2n
Number of tetrahedral voids = 2 (4)
Number of tetrahedral voids = 8