Crystalline solids :
1. They have definite characteristic geometrical shape.
2. They have long range order of regular pattern of arrangement of constituent particles.
3. They are true solids.
4. They have sharp melting points.
5. They are anisotropic in nature.
6. They have definite heat of fusion.
Amorphous solids :
1. They have irregular shape.
2. They have short range order of regular pattern of arrangement of constituent particles.
3. They are pseudo solids or supercooled liquids.
4. They do not have sharp melting points.
5. They are isotropic in nature.
6. They do not have definite heat of fusion.
