HEXAGONAL AXES
Generators selected (1); t(1, 0, 0); t(0, 1, 0); t(0, 0, 1); t(2/3, 1/3, 1/3); (2); (4)
Multiplicity, Wyckoff letter, Site symmetry | Coordinates |
|
| (0, 0, 0)+ (2/3, 1/3, 1/3)+ (1/3, 2/3, 2/3)+ |
| (1) x, y, z | (2) -y, x - y, z | (3) -x + y, -x, z | (4) -y, -x, z | (5) -x + y, y, z | (6) x, x - y, z |
|
I Maximal translationengleiche subgroups
[2] R31 (146, R3) | (1; 2; 3)+ |
|
|
| [3] R1m (8, C1m1) | (1; 4)+ | 1/3(-a + b - 2c), -a - b, c
|
| [3] R1m (8, C1m1) | (1; 5)+ | 1/3(-a - 2b - 2c), a, c
|
| [3] R1m (8, C1m1) | (1; 6)+ | 1/3(2a + b - 2c), b, c
|
|
|
II Maximal klassengleiche subgroups
- Loss of centring translations
[3] P3m1 (156) | 1; 2; 3; 4; 5; 6 | | |
[2] a' = -b, b' = a + b, c' = 2c
R3m (160) | <2; 4> | -b, a + b, 2c | |
[2] a' = a + b, b' = -a, c' = 2c
R3c (161) | <2; 4 + (0, 0, 1)> | a + b, -a, 2c | |
[4] a' = -2b, b' = 2a + 2b
| R3m (160) | <2; 4> | -2b, 2a + 2b, c | | R3m (160) | <2 + (1, -1, 0); 4 + (1, 1, 0)> | -2b, 2a + 2b, c | 1, 0, 0 | R3m (160) | <2 + (1, 2, 0); 4 + (1, 1, 0)> | -2b, 2a + 2b, c | 0, 1, 0 | R3m (160) | <2 + (2, 1, 0); 4 + (2, 2, 0)> | -2b, 2a + 2b, c | 1, 1, 0 |
|
- Series of maximal isomorphic subgroups
[p] c' = pc
R3m (160) | <2; 4> | -b, a + b, pc | | | p > 1; p ≡ 2 (mod 3) no conjugate subgroups |
R3m (160) | <2; 4> | a, b, pc | | | p > 6; p ≡ 1 (mod 3) no conjugate subgroups |
|
[p2] a' = -pb, b' = pa + pb
R3m (160) | <2 + (u + v, -u + 2v, 0); 4 + (u + v, u + v, 0)> | -pb, pa + pb, c | u, v, 0 | | p > 1; 0 ≤ u < p; 0 ≤ v < p p2 conjugate subgroups for prime p ≡ 2 (mod 3) |
|
[p2] a' = pa, b' = pb
R3m (160) | <2 + (u + v, -u + 2v, 0); 4 + (u + v, u + v, 0)> | pa, pb, c | u, v, 0 | | p > 6; 0 ≤ u < p; 0 ≤ v < p p2 conjugate subgroups for prime p ≡ 1 (mod 3) |
|
I Minimal translationengleiche supergroups
[2] R-3m (166); [4] P-43m (215); [4] F-43m (216); [4] I-43m (217) |
II Minimal non-isomorphic klassengleiche supergroups
- Additional centring translations
[3] a' = 1/3(2a + b), b' = 1/3(-a + b), c' = 1/3c P31m (157) |