Question

In a face centered lattice of x and y x atoms are present at the corners while y atoms are at face centres. What is the formula of the compound.

Answer 1

As X is present at the corners of the lattice . Since, the partition of corner atom is 1/8 and lattice has 8 corners .Therefore total no. of X atom is.

X = 1/8 * 8 = 1 => X = 1

and Y is present at the face centred of the lattice . Since, the partition of face centred atom is 1/2 and lattice has 6 face centred .Therefore total no. of Y atom is.

Y = 1/2 * 6 = 3 => Y = 3

therefore,

the molecular formula of compound is

X1Y3 = XY3