Question

A compound made of elements

C and D crystallizes in fcc structure. Atoms

of C are present at the corners of the cube.

Atoms of D are at the centres of faces of the

cube. What is the formula of the compound?​

Answer 1

$\large\boxed{\fcolorbox{blue}{yellow}{Answer:-}}$

Solution : The atoms of element B form

ccp structure. The number of tetrahedral

voids generated is twice the number of B

atoms.Thus, number of tetrahedral voids = 2B

The atoms A occupy (1/3) of these

tetrahedral voids.Hence, number of A atoms = 2B×1/3Ratio of A and B atoms = 2/3 B: 1B

= 2/3:1 = 2:3

Formula of compound = A2B3

Answer 2

Formula of compound = A2B3✨