Origin at 2 3
Asymmetric unit | 0 ≤ x ≤ 1; 0 ≤ y ≤ 1; 0 ≤ z ≤ 1/2; y ≤ 1 - x; z ≤ min(x, y) |
Vertices | 0, 0, 0 | 1, 0, 0 | 0, 1, 0 | 1/2, 1/2, 1/2 |
|
(1) 1 | (2) 2 0, 0, z | (3) 2 0, y, 0 | (4) 2 x, 0, 0 |
(5) 3+ x, x, x | (6) 3+ -x, x, -x | (7) 3+ x, -x, -x | (8) 3+ -x, -x, x |
(9) 3- x, x, x | (10) 3- x, -x, -x | (11) 3- -x, -x, x | (12) 3- -x, x, -x |
Generators selected (1); t(1, 0, 0); t(0, 1, 0); t(0, 0, 1); (2); (3); (5)
Multiplicity, Wyckoff letter, Site symmetry | Coordinates | Reflection conditions |
| | h, k, l cyclically permutable General:
|
| (1) x, y, z | (2) -x, -y, z | (3) -x, y, -z | (4) x, -y, -z | (5) z, x, y | (6) z, -x, -y | (7) -z, -x, y | (8) -z, x, -y | (9) y, z, x | (10) -y, z, -x | (11) y, -z, -x | (12) -y, -z, x |
| no conditions |
| | Special: as above, plus
|
| x, 1/2, 1/2 | -x, 1/2, 1/2 | 1/2, x, 1/2 | 1/2, -x, 1/2 | 1/2, 1/2, x | 1/2, 1/2, -x |
| no extra conditions |
| x, 1/2, 0 | -x, 1/2, 0 | 0, x, 1/2 | 0, -x, 1/2 | 1/2, 0, x | 1/2, 0, -x |
| no extra conditions |
| x, 0, 1/2 | -x, 0, 1/2 | 1/2, x, 0 | 1/2, -x, 0 | 0, 1/2, x | 0, 1/2, -x |
| no extra conditions |
| x, 0, 0 | -x, 0, 0 | 0, x, 0 | 0, -x, 0 | 0, 0, x | 0, 0, -x |
| no extra conditions |
| x, x, x | -x, -x, x | -x, x, -x | x, -x, -x |
| no extra conditions |
| 1/2, 0, 0 | 0, 1/2, 0 | 0, 0, 1/2 |
| no extra conditions |
| 0, 1/2, 1/2 | 1/2, 0, 1/2 | 1/2, 1/2, 0 |
| no extra conditions |
| | no extra conditions |
| | no extra conditions |
Symmetry of special projections
Along [001] p2mm a' = a b' = b Origin at 0, 0, z | Along [111] p3 a' = 1/3(2a - b - c) b' = 1/3(-a + 2b - c) Origin at x, x, x | Along [110] p1m1 a' = 1/2(-a + b) b' = c Origin at x, x, 0 |
Maximal non-isomorphic subgroups
I | | [3] P21 (P222, 16) | 1; 2; 3; 4 |
| | [4] P13 (R3, 146) | 1; 5; 9 | | [4] P13 (R3, 146) | 1; 6; 12 | | [4] P13 (R3, 146) | 1; 7; 10 | | [4] P13 (R3, 146) | 1; 8; 11 |
|
IIb | [2] F23 (a' = 2a, b' = 2b, c' = 2c) (196); [4] I213 (a' = 2a, b' = 2b, c' = 2c) (199); [4] I23 (a' = 2a, b' = 2b, c' = 2c) (197) |
Maximal isomorphic subgroups of lowest index
IIc | [27] P23 (a' = 3a, b' = 3b, c' = 3c) (195) |
Minimal non-isomorphic supergroups
I | [2] Pm-3 (200); [2] Pn-3 (201); [2] P432 (207); [2] P4232 (208); [2] P-43m (215); [2] P-43n (218) |
II | [2] I23 (197); [4] F23 (196) |