The Solid State Part -1

Chemistry                The Solid State

The solid state is the solid state of matter in which the constituent particles are closely packed in the lattice and are unable to move. They can only vibrate along their axes.

Classification of solids : 

1. Crystalline solids

2. Amorphous solids

Classification of crystalline solids: 

1. Molecular solids

2. Ionic solids

3. Covalent solids

4. Metallic solids

X - ray  Differation by Crystal:

Bragg Equation :

Space Lattice and Unit Cell : 

Space Lattice or crystal lattice or lattice --- Three dimension arrangement

Unit Cell : Unit cell is the smallest three dimensional group of lattice point which, when repeated in three dimentions in space, gives the whole lattice of the crystal.

Types of Unit Cell : 

 1. Primitive or Basic cell - known as seven crystal lattice.

(1) Cubic or isometric system

(2) Tetragonal system

(3) Orthogonal system

(4) Rhombohedral system

(5) Monoclinic system

(6) Hexagonal system

2. Face centered unit cell

3. Body centered unit cell

4. Side centered unit cell

Different type of Cubic system :

1. Simple cubic system

2. Body centered cubic system

3. Face centered cubic system