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
P212121 (19) Space Group
Table 1665. P212121 (19) space group.
Name in the International Tables for Crystallography |
P212121 |
|
P |
|
47 |
|
222 |
Crystal system |
Orthorhombic |
|
mmm |
Asymm |
0 ≤ x ≤ 1/2 and 0 ≤ y ≤ 1/2 and 0 ≤ z ≤ 1 |
|
4 |
Absence of reflections |
h00 for h = 2n+1 (odd) (21-screw axis along a), 0k0 for k = 2n+1 (odd) (21-screw axis along b) |
Translation |
|
Symmetry (atomic coordinates) |
X, Y, Z; 1/2-X, -Y, 1/2+Z; -X, 1/2+Y, 1/2-Z; 1/2+X, 1/2-Y, -Z |
Crystal symmetry |
Is non-centrosymmetric because it has not -x,-y,-z in its symmetry. |
Reflection & intensity |
1 0 0 |
0.8 |
|
2 0 0 |
5135.4 |
|
4 1 0 |
2654.1 |
0 1 0 |
0.6 |
2 1 0 |
295.2 |
5 0 0 |
0.2 |
0 2 0 |
7899.4 |
2 2 0 |
2654.1 |
5 1 0 |
895.6 |
0 3 0 |
0.3 |
2 3 0 |
397.8 |
6 0 0 |
2654.1 |
0 4 0 |
4372.5 |
2 3 0 |
397.8 |
6 1 0 |
1243.8 |
1 1 0 |
3742.3 |
2 4 0 |
1243.8 |
7 0 0 |
0.1 |
1 2 0 |
1200.1 |
3 0 0 |
0.3 |
7 1 0 |
367.1 |
1 3 0 |
5135.4 |
3 4 0 |
895.1 |
8 0 0 |
1243.8 |
1 4 0 |
336.4 |
4 0 0 |
3742.3 |
8 1 0 |
2654.1 |
|
Remarks |
A non-chiral Sohncke space group with chiral structures: The sets of coordinates include enantiometric pairs. |
Crystal examples |
|
|