|They have definite characteristic geometrical shape as constituent particles are arranged in orderly regular long range manner.
||They do not have definite geometrical shape. This is due to short range order of constituent particles.
|They have sharp melting point. They melt completely at one constant temperature.
||They do not have sharp melting point. As temperature is raised, they gradually soften, becomes less viscous and melt over a temperature range.
|They are pure solid
||They are supercooled liquid.