{ ZnS }

Make cube dimensions 4.16 A.
Place S2- atoms at the corners of the cube.
Place S2- atoms at the faces of the cube.
Place Zn2+ atoms at (0.25,0.25,0.25) (0.75,0.75,0.25) 
Place Zn2+ atoms at (0.75,0.25,0.75) (0.25,0.75,0.75).