1.

In a compound, atoms of element Y form ccp lattice and those of 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 :No. of Y atoms in a unit cell = 4
No. of TETRAHEDRAL SITES = 8
No. of X atoms in a unit cell ` = 8 xx ( 2)/( 3) = ( 16)/( 3)`
COMPOUND `: X_(16//3)Y_(4) ` or `X_(4) Y_(3)`


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