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Which of the following is a characteristic of crystalline structure?

High density, long-range of order, the sharp diffraction pattern is a characteristic of crystalline structure.

  • A crystalline structure has a very close packing of atoms thus giving rise to high density to the material it possesses when compared to its non-crystalline form.
  • For example, quartz is the crystalline form of silica has a density of about 2.65 gm/cm3, whereas its ally–non-crystalline form silica glass has a density of 2.20 gm/cm3.
  • For reference, the other properties being differentiated between crystalline and non-crystalline forms are tabulated below.
Differentiating Parameter Structure
Crystalline Structure Non-Crystalline Structure
Geometry Well defined geometrical shape Random shape
Melting point Definite melting point Rage of melting point
Density High density when compared to non-crystalline structure due to strong primary atomic bonding. Low density when compared to crystalline structure due to weak secondary atomic bonding
Range of order Long-range of order (periodicity) Short-range of order (periodicity)
XRD Diffraction pattern Sharp diffraction pattern Broad hump
Examples Iron, Steel, HDPE, Quartz, etc. Metallic glass, silica glass, LDPE, etc.