cm | No. 5 | c1m1 |
Generators selected (1); t(1, 0); t(0, 1); t(1/2, 1/2); (2)
General position
Multiplicity, Wyckoff letter, Site symmetry | Coordinates | ||||||
(0, 0)+ (1/2, 1/2)+ | |||||||
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I Maximal translationengleiche subgroups
[2] c1 (1, p1) | 1+ | 1/2(a - b), 1/2(a + b) |
II Maximal klassengleiche subgroups
- Loss of centring translations
[2] pg (4) | 1; 2 + (1/2, 1/2) | 1/4, 0 | |
[2] pm (3) | 1; 2 |
- Enlarged unit cell
[3] a' = 3a
|
[3] b' = 3b
cm (5) | <2> | a, 3b |
- Series of maximal isomorphic subgroups
[p] a' = pa
cm (5) | <2 + (2u, 0)> | pa, b | u, 0 |
p > 2; 0 ≤ u < p p conjugate subgroups for the prime p |
[p] b' = pb
cm (5) | <2> | a, pb | |
p > 2 no conjugate subgroups |
I Minimal translationengleiche supergroups
[2] c2mm (9); [3] p3m1 (14); [3] p31m (15) |
II Minimal non-isomorphic klassengleiche supergroups
- Additional centring translations
none |
- Decreased unit cell
[2] a' = 1/2 a, b' = 1/2 b pm (3) |