AP EAMCET Engineering 21 Apr 2019 Shift 2 Paper

Atoms of the element Y (as anions) make cop and those of the element X (as cations) occupy all the octahedral voids.
since, ‌

1

2

of the octahedral and ‌

1

2

of tetrahedral voids are occupied by the atoms of X
The total number of atoms of X is,
NX=‌

1

2

N+‌

2N

2

=‌

3

2

N
The ratio of X:Y is ‌

3

2

N:N=3:2
The formula comes out to be X3Y2