My lecturer writes the following in his lecture notes: " In an ionic bond, the force is not saturated so that one ion bonds to many near neighbours (as many as packing will allow) " What does saturation mean in this context? Clearly, the binding force is largely due to the electrostatic force and not gravitational, right? This is because the electrostatic force between two particles is much much stronger than the gravitational force ?? Finally, how does a lack of saturation allow one ion to bond with as many neighbours as packing will allow? And what exactly does packing mean in this context? Any help will be greatly appreciated!