Cadmium Sulphide (CdS) Has A Cubic Unit Cell. From X-ray Diffraction, The Unit Cell Edge Length Is 0.562nm. If The Measured Density Is 4.82 G/cm^3, How Many Cd2+ And S2- Ions Are There Per Unit Cell?

What are the ionic radii? From this, surely you can calculate the atomic packing factor and hence the type of structure.

Is this unit-cell structure charged balanced? If not, how do we make it so?