What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy 2/3rd of tetrahedral voids?
Let the number of particles of element Y in ccp lattice = N Number of tetrahedral voids = 2N Number of particles of element X = 2/3 × 2N = 4/3 N X:Y = 4/3 N:N X:Y = 4:3 Formula of the compound is X4Y3.
