A solid compound contains X,Y and Z atom...

A solid compound contains X,Y and Z atoms in a cubic lattice with X atom occupying the corners, Y atoms in the body centred postion and Z atoms at the centres of faces of the unit cell. What is the empirical formula of the compound?

`XY_2Z_3`

`XYZ_3`

`X_2Y_2Z_3`

`X_8YZ_6`

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