Chapter/Index: Introduction | A |
B |
C |
D |
E |
F |
G |
H |
I |
J |
K |
L |
M |
N |
O |
P |
Q |
R |
S |
T |
U |
V |
W |
X |
Y |
Z |
Appendix
Polar Point Groups for Ferroelectricity
Table 2378 list the ten polar point groups that can possess ferroelectricity.
Table 2378. The ten polar point groups that can possess ferroelectricity.
Polar point groups
(Schönflies) |
Crystal system |
Possible ferroelectric polarizations (Crystal coordinates
) |
Possible domain walls |
1 (C1)
|
Triclinic |
P1, P2, P3 |
48 types |
2(C2) |
Monoclinic |
0, P2, 0 |
24 types |
4mm(C4v)
|
Trigonal
|
0, 0, 0, P3 |
1 type: 180° ⊥ to (001) |
3(C3) |
0, 0, P3 |
4(C4) |
Tetragonal |
0, 0, P3 |
2 types: 90° [110], 180° [001] |
3m(C3v)
|
Hexagonal |
0, 0, P3 |
|
6(C6) |
|
m (CS)
|
|
P1, 0, P3 |
|
mm2 (C2v)
|
Orthorhombic |
0, 0, P3 |
4 types: 60°, 120°:[100], 90°, 180°:[110] |
6mm(C6v) |
|
0, 0, P3 |
|
|