Origin on 2 [0 1 0] at 43 (1, 2) 1
Asymmetric unit | 0 ≤ x ≤ 1; 0 ≤ y ≤ 1; 0 ≤ z ≤ 1/8 |
Symmetry operations
(1) 1 | (2) 2(0, 0, 1/2) 0, 0, z | (3) 4+(0, 0, 3/4) 0, 0, z | (4) 4-(0, 0, 1/4) 0, 0, z |
(5) 2 0, y, 0 | (6) 2 x, 0, 1/4 | (7) 2 x, x, 1/8 | (8) 2 x, -x, 3/8 |
Generators selected (1); t(1, 0, 0); t(0, 1, 0); t(0, 0, 1); (2); (3); (5)
Positions
Multiplicity, Wyckoff letter, Site symmetry | Coordinates | Reflection conditions | |||||||||||
General: | |||||||||||||
|
| 00l : l = 4n |
Special: as above, plus | |||||||||
|
| 0kl : l = 2n + 1 or l = 4n | |||||||
|
| hhl : l = 2n + 1 or l = 4n | |||||||
|
| hhl : l = 2n + 1 or l = 4n |
Symmetry of special projections
Along [001] p4mm a' = a b' = b Origin at 0, 0, z | Along [100] p2gm a' = b b' = c Origin at x, 0, 1/4 | Along [110] p2gm a' = 1/2(-a + b) b' = c Origin at x, x, 1/8 |
Maximal non-isomorphic subgroups
I | [2] P4311 (P43, 78) | 1; 2; 3; 4 | |
[2] P2112 (C2221, 20) | 1; 2; 7; 8 | ||
[2] P2121 (P2221, 17) | 1; 2; 5; 6 |
IIa | none |
IIb | [2] C43221 (a' = 2a, b' = 2b) (P43212, 96) |
Maximal isomorphic subgroups of lowest index
IIc | [2] C4322 (a' = 2a, b' = 2b) (P4322, 95); [3] P4122 (c' = 3c) (91); [5] P4322 (c' = 5c) (95) |
Minimal non-isomorphic supergroups
I | none |
II | [2] I4122 (98); [2] P4222 (c' = 1/2c) (93) |