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 |
|
|
