Differentiate between Crystalline solids and Amorphous solids?

							









    

        

            

            
Crystalline   Solids
            
            

            
Amorphous   Solid
            
        
        

            

            
1)        They have a regular three dimensional arrangement   of atoms, ions or molecules due to which they have well defined geometrical   shape.
            
            

            
They   do not have regular arrangement of particles, therefore do not have well   defined particles.
            
        
        

            

            
2)        They have long range order
            
            

            
They   have short range order
            
        
        

            

            
3)        They have sharp melting point i.e., they melt at a   particular temperature.
            
            

            
They   do not have sharp melting point i.e., they melt over a range of temperature.
            
        
        

            

            
4)        They have high and fixed heat of fusion, i.e.,   high energy is required to melt 1 mole of crystalline solid.
            
            

            
They   do not have fixed heat of fusion.
            
        
        

            

            
5)        They are anisotropic, i.e., they have different   optical and electrical properties in different directions.
            
            

            
They   are isotropic, i.e., they have same properties in all directions.
            
        
        

            

            
6)        They are true solids, i.e., they show all the   characteristic properties of solids.
            
            

            
They   are pseudo – solids, i.e., they do not show all the characteristic properties   of solids.
            
        
        

            

            
 
            
            

            
 
            
        
    

						

							Crystalline - (1) are true solids
(2) are those solids in which particles are arranged in regular and peroidic manner in 3-d space
(3) have long range order
(4) can be cut into clean surfaces
(5) are made up of unit cell
(6) have fixed or sharp melting point
(7) have definite value for heat of fusion
(8) are aniisotropic

Amorphous - (1) pseudo solids or supercooled liquids
(2) particles not arranged in regular manner
(3) short range orfer
(4) not made up of unit cell 
(5) can not be cut into clean surfaces
(6) do not sharp melting pt , they have melting range
(7) do not have fixed value for heat  of fusion
(8) are isotropic