00:01
First we are going to see what is crystal system and bravice lattice.
00:16
In the crystal we see there are two parts of crystal.
00:26
One is lattice and another one is this.
00:34
What is lattice? latus is the periodicity of the atoms.
00:42
Periodicity of atoms where basis is when we put the atoms in when we put atoms in lattice point this will be called as base lattice this is all about the crystal system so what is bravest lattice is that we can build it in for 14 ways that it can 14 ways to build the 3d repeating crystal.
01:32
So here we see what is 2 types of crystal system and bravite slatis.
01:45
Now we are going to see what are the symmetry operators.
01:52
Symmetry operators are first one will be the identity operation.
02:01
Operation, identity operations or if commonly written as if.
02:10
Next one will be reflection, reflection, then we will see inversion, then there will be rotation and the last one we will observe that will be stereographic, stereographic projection.
02:41
In the case of rotation, we will see what will be proper rotation and what will be the improper rotation.
02:51
Improper rotation.
02:53
If we will identify dual symmetry operators, then we can arrange the lattice.
03:00
That is, in this way, the arrangement of atoms in lattice can be done.
03:16
Can be done by using those symmetry operators.
03:21
So these are the symmetry operators...