## Introduction to Solid State Physics |

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Page 10

The pattern of symmetry elements is known as a

unit of the complete

The pattern of symmetry elements is known as a

**space group**, and a plan of aunit of the complete

**space group**p2 (short symbol) is shown in Fig. 1.6b. A**space****group**is a repetitive pattern of symmetry elements. It is not a crystal structure.Page 11

Two-pixiession AL LATTICEs, Poist Giov's “S”

Symbols SpaceSystem and Lattice Symbol . Group roup Full Short Number - - - - -

- - – __ ! -- – Oblique 1 pl pl 1 p (primitive) 2 p211 p2 2 p1 m 1 pm 3 pn plgl pg 4 ...

Two-pixiession AL LATTICEs, Poist Giov's “S”

**SPACE GROUPS Space**-**Group**Symbols SpaceSystem and Lattice Symbol . Group roup Full Short Number - - - - -

- - – __ ! -- – Oblique 1 pl pl 1 p (primitive) 2 p211 p2 2 p1 m 1 pm 3 pn plgl pg 4 ...

Page 32

Structure of a crystal based on

represented by the scalene triangle, which is repeated throughout the structure.

The unit is at some height, as indicated by + , above the base of the cell. (After

Phillips.) ...

Structure of a crystal based on

**space group**P 1. A unit of the structure isrepresented by the scalene triangle, which is repeated throughout the structure.

The unit is at some height, as indicated by + , above the base of the cell. (After

Phillips.) ...

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absorption acceptors alkali alloys approximately atoms axis barium titanate boundary Bragg Brillouin zone calculated chapter charge conduction band conduction electrons crystal structure cube cubic Curie point Debye density dielectric constant diffraction diffusion dipole direction discussion dislocation distribution domain effective mass elastic electric field energy equation equilibrium exciton experimental F centers factor Fermi ferroelectric ferromagnetic free electron frequency germanium given heat capacity hexagonal holes impurity interaction ionization ions lattice constant lattice point low temperatures magnetic field magnetic moment metals molecules motion nearest neighbor normal observed p-n junction paramagnetic particles phonons Phys physics plane polarizability polarization positive potential Proc region resonance result room temperature rotation semiconductor Shockley shown in Fig sodium chloride solid solution space group specimen spin superconducting surface susceptibility symmetry Table theory thermal tion transition unit volume vacancies valence band values vector velocity wave functions wavelength zero