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SOLID STATE PHYSICS (MIND MAP 1), BRAVAIS LATTICE all atoms are…

- - - - CRYSTALLINE
        
        Equilibrium position of atoms form a repeated geometrical pattern.
        
        eg; metals, alloys and semiconductor.( diamond, germs)
      - AMORPHOUS
        
        equilibrium positions of atoms do not form a repeated pattern even within a short range. - eg; ceramics, glasses
      - POLYCRYSTALLINE
        
        consists of a group of crystal
        
        arrangement of atoms forms a pattern as in a crystal but the orientation change at the crystalline boundaries.
        
        eg; metals, alloys, and semiconductor
- - - - A 2π rotational operation around any axis - occur on any object
        
        Er -> r (r is a vector connecting any origin and a point)