Question

an ionic crystal is made of
two elements
X and Y. Y ions formed the crystal lattice and X ions occupy half of
the tetrahedral void.
What is the formula of crystalline
formed the​

Answer 1

Answer:

I think this answer?

Explanation:

Correct option is

A

X

4

Y

3

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

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