Page 9 - Solid State

Unit Cells of 14 Types of Bravais Lattices
a
a

a

Primitive Body-centred Face-centred
(or simple)
The three cubic lattices: all sides of same
length, angles between faces all 90°

≠
γ
≠ r l m o E T c l c C B H . 7 u O , . , O
α
≠
≠
β
S
0
b
a
P
n
o
i
c
MnMono ndβN O4rP ma≠b≠cα≠γ≠K r2H O3
S 12O CO4 5H2
Primitive Body-centred
The two tetragonal: one side different in length to the other,
two angles between faces all 90°
Primitive End-centred Body-centred Face-centred
The four orthorhombic lattices: unequal sides, angles
between faces all 90°

More than
90°

Less than
90°

Primitive End-centred
The two monoclinic lattices: unequal sides,
two faces have angles different to 90°

9 The Solid State