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Question

How can anyone differentiate crystalline and amorphous solids?


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Solution

Difference between crystalline and amorphous solids:

Crystalline solid

Amorphous solid

  • Crystalline solids do have a regularly ordered structure or a definite characteristic shape.
  • Amorphous solids do not have any regularly ordered structure or definite characteristic shape.
  • They have a sharp and characteristic melting point.
  • They do not have any sharp melting point.
  • Crystalline solids have a finite and characteristic heat of fusion.
  • Amorphous solids have no definite heat of fusion as like crystalline solids.
  • These are Anisotropic in nature since physical properties are different in different directions.
  • These are mostly of Isotopic nature as they have the same physical properties in all directions.
  • Crystalline solids are known as true solids.
  • Amorphous solids are known as pseudo solids.
  • Example: Sodium chloride, Cesium chloride
  • Example: Glass, Rubber, Plastic, etc.

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