Zinc blende, the cubic form of zinc sulfide, crystallizes with a face centered cubic space lattice.

One description of the structure places the centers of sulfide ions
at the lattice points.

The zinc ions occupy one-half of the tetrahedral holes in the anion array.

The ZnS unit cell contains several zinc ions and sulfide ions.

Click the links on the right to illustrate these concepts. The underlined texts above link to definitions.