The monoclinic structure has two unit cells. The primative cell (P) has fractional lattice points at the corners of the cell, and the base-centered cell (C) has additional fractional lattice points at ...

will occupy the latice points that define the face centered cubic unit cell, with the zinc ions occupying the tetrahedral holes. Since there are four sulfide ions (FCC), we need only four zinc ions to ...

The crystal lattice parameter is 0.563 nm. The diagram shows both a unit cell with ion locations indicated (a ... and a term due to the zero point energy of 0.075 eV. Because of its ionic bonding the ...