In a compound atoms of element 'Y' form ...

In a compound atoms of element 'Y' form C.C.P. lattice and those of element 'X' occupy 2/3rd of tetrahedral voids. The formula of the compound will be

`X_(2)Y_(3)`

`X_(2)Y`

`X_(3)Y_(4)`

`X_(4)Y_(3)`

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