Crystal Lattice And Unit Cell Video Lecture | Additional Study Material for Class 12

crystal lattice and unit cell
three-dimensional cubic lattice the
three-dimensional arrangement of
particles as points in space is called
space lattice or crystal lattice these
are fourteen different three dimensional
lattices are possible which are called
bravery's lattice bravest was a French
mathematician unit cell parameters a B C
are three edges as alpha beta and gamma
are the angles between them
unit cell is a simple part of crystal
lattice which repeats itself to generate
a crystal unit cell types of unit cells
it is of two types a primitive and be
centered when the Constituent particles
are present only at the corners of the
unit cell then it is called primitive
unit cell when the constituent particles
are present at other positions along
with corners then it is called Center
the unit cell it's again of three types
one body centered to face centered three
and centered one body centered if the
constituent particle is present at the
body centered along with corners called
body centered unit cell to face centered
if the Constituent particles are present
at the sixth face centers along with
corners called face centered units l3m
centered if the Constituent particles
are present at the centres of any two
opposite faces along with corners called
n centered unit cell
seven crystal systems crystal systems
these are 230 crystal forms possible
these are classified into 32 classes on
the basis of symmetry which are further
divided into seven crystal systems
depending on the crystallographic
parameters a B C and alpha beta gamma
you