In ABC ABC packing, if the number of atoms in the unit cell is ‘n’ then the number of tetrahedral voids in the unit cell is equal to

ABC ABC packing…ccp ;Number of effective atoms/unit cell = 8×1/8 + 6×½ = 4 ;Each boy diagonal has 2 tetrahedral voids on it ;Number of TV/unit cell = 2 ×4 = 8 ;Number of atoms(given) = n ;ThusNumber of tetrahedral voids =  2n.