【正文】
f translate by a vector 332211 auauauT ???? ???Operation Element Rotation Axis Reflection Plane Inversion Point Rotoinversion Axes 90176。SOLID MATERIALS CRYSTALLINE POLYCRYSTALLINE AMORPHOUS (Noncrystalline) Single Crystal ELEMENTARY CRYSTALLOGRAPHY Review Solid: Crystal vs. Amorphous (glassy) Ordered array of atoms Disordered arrangement Competition between attractive (binding) force and repulsive force. Regular array lowers system energy. Deals with the geometric description of crystals and their internal arrangement. The branch of science crystallography Symmetry of a crystal can have a profound influence on its properties. Any crystal structure should be specified pletely, concisely and unambiguously. Structures should be classified into different types according to the symmetries they possess. For SSP crystal structure ? CONTENTS ? Periodic arrays of atom lattice translation vectors Basis and crystal structure Primitive l