Question

Charge on element X = 3+, Y = 2-, formula of the compound would be.
(a) X₃Y₂
(b) Y₃X₂
(c) X₂Y₃
(d) Y₂X₃​

Answer 1

Answer:

Y occupies CCP lattice hence the effective number of Y = 4 ( effective no of atoms in CCP is 4)

X occupies 2/3 of tetrahedral voids . Number of tetrahedral voids generated in any unit cell is = 2Z ( twice of an effective number of atoms in unit cell )

= 2×4 = 8

Since X occupies 2/3 of tetrahedral voids , so Effective number of X =

3

2

×8= 3

16

So X=

3

16

& Y=4 ,

Hence simplest formula is X

4

Y

3

Answer 2

Answer:

on :

No. of atoms of

for

<br> No. of atoms of

for

<br>

Formula of compound will be