In a compound, atoms of element Y form ccp lattice and those of element X occupy 2//3^(rd) of tetrahedral voids. The formula of the compound will be

In a compound, atoms of element Y form ccp lattice and those of elemen

1.	In a compound, atoms of element Y form ccp lattice and those of element X occupy 2//3^(rd) of tetrahedral voids. The formula of the compound will be
Answer» `X_(3)Y_(4)` `X_(4)Y_(3)` `X_(2)Y_(3)` `X_(2)Y` Solution :NUMBER of Y atoms per unit CELL in ccp lattice (N) = 4 Number of tetrahedral voids `= 2N=2xx4=8` Number of tetrahedral voids occupied by `X=(2)/(3)rd` of the tetrahedral void `=(2)/(3)xx8=(16)/(3)` HENCE, the formula of the COMPOUND will be `X_(16//3)Y_(4)=X_(4)Y_(3)`