Class 12th "SOLID STATE"
CRYSTAL SYSTEMS There is seven types of Crystal system: 1. Cubic 2. Tetragonal 3. Orthorhombic 4. Monoclinic 5. Triclinic 6. Hexagonal 7. Rhombohedral or Trigonal "Crystal systems are defined based on 'Parameters' of a Unit cell : A unit cell is characterized by six parameters. a, b, c = edge length alpha, beta, gama = angles • Alpha(L) : angles lies between edges b & c. • Beta(B) : angles lies between edges a & b. • Gama(Y) : angles lies between edges a & b. Parameters are in various Crystal system : The following chart are defined that parameters of various Crystal system. Variations within a Crystal System: Following types of variations we can see in the Crystal system. A. Primitive Unit Cells/Simple Unit Cell(PC or SC) B. Body-Centred Unit Cell(BCC) C. Face-Centred Unit Cell(FCC) D. End-Centre...