Origin at 6 m m
Asymmetric unit | 0 ≤ x ≤ 2/3; 0 ≤ y ≤ 1/3; x ≤ (1 + y)/2; y ≤ x/2 |
Vertices | |
(1) 1 | (2) 3+ 0, 0 | (3) 3- 0, 0 |
(4) 2 0, 0 | (5) 6- 0, 0 | (6) 6+ 0, 0 |
(7) m x, -x | (8) m x, 2x | (9) m 2x, x |
(10) m x, x | (11) m x, 0 | (12) m 0, y |
Generators selected (1); t(1, 0); t(0, 1); (2); (4); (7)
Multiplicity, Wyckoff letter, Site symmetry | Coordinates | Reflection conditions |
|
| | General:
|
| (1) x, y | (2) -y, x - y | (3) -x + y, -x | (4) -x, -y | (5) y, -x + y | (6) x - y, x | (7) -y, -x | (8) -x + y, y | (9) x, x - y | (10) y, x | (11) x - y, -y | (12) -x, -x + y |
| no conditions |
| | Special: as above, plus
|
| x, -x | x, 2x | (-2x), -x | -x, x | -x, (-2x) | 2x, x |
| no extra conditions |
| x, 0 | 0, x | -x, -x | -x, 0 | 0, -x | x, x |
| no extra conditions |
| | no extra conditions |
| | no extra conditions |
| | no extra conditions |
Maximal non-isomorphic subgroups
I | [2] p611 (p6, 16) | 1; 2; 3; 4; 5; 6 |
| [2] p31m (15) | 1; 2; 3; 10; 11; 12 |
| [2] p3m1 (14) | 1; 2; 3; 7; 8; 9 |
| | [3] p2mm (c2mm, 9) | 1; 4; 7; 10 | | [3] p2mm (c2mm, 9) | 1; 4; 8; 11 | | [3] p2mm (c2mm, 9) | 1; 4; 9; 12 |
|
Maximal isomorphic subgroups of lowest index
IIc | [3] h6mm (a' = 3a, b' = 3b) (p6mm, 17) |
Minimal non-isomorphic supergroups