TS EAMCET 4 May 2018 Shift 1 Solved Paper

The number of cell per unit for fcc lattice is 4.
In fcc structure total number of octahedral voids is 4 which is
equal to the number of X atoms.
In fcc structure total number of tetrahedral is 8
The number of Y atoms is calculated as,
number of Y atoms =

1

3

×8
=

8

3

Therefore, the formula of the compound is X3Y2Z3