|
Axes |
Coordinates |
Wyckoff positions |
|
|
|
4a |
4b |
8c |
| I Maximal translationengleiche subgroups |
| [2] C211 (5) |
|
|
2a; 2b |
4c |
2 × 4c |
![[conventional setting]](/graphics/sg/Wconv.gif) C121 |
-b, a, c |
-y, x, z |
|
|
|
| [2] C121 (5) |
|
x, y, z + (1/4) |
4c |
2a; 2b |
2 × 4c |
| [2] P1121 (4) |
(1/2)(a - b), (1/2)(a + b), c |
x - y, x + y, z |
2a |
2a |
2 × 2a |
| II Maximal klassengleiche subgroups |
| Loss of centring translations |
| [2] P212121 (19) |
|
x + (1/4), y, z |
4a |
4a |
2 × 4a |
| [2] P22121 (18) |
|
x + (1/4), y, z |
2a; 2b |
4c |
2 × 4c |
| P21212 |
b, c, a |
y, z, x + (1/4) |
|
|
|
| [2] P21221 (18) |
|
x, y + (1/4), z + (1/4) |
4c |
2a; 2b |
2 × 4c |
| P21212 |
c, a, b |
z + (1/4), x, y + (1/4) |
|
|
|
| [2] P2221 (17) |
|
|
2a; 2b |
2c; 2d |
2 × 4e |
| Enlarged unit cell, isomorphic |
| [3] C2221 |
3a, b, c |
(1/3)x, y, z; ±((1/3), 0, 0) |
3 × 4a |
4b; 8c |
3 × 8c |
| [p] C2221 |
pa, b, c |
(1/p)x, y, z; +((u/p), 0, 0) |
p × 4a |
4b; (1/2)(p - 1) × 8c |
p × 8c |
|
p = prime > 2; u = 1, . . ., p - 1 |
|
|
|
| [3] C2221 |
a, 3b, c |
x, (1/3)y, z; ±(0, (1/3), 0) |
4a; 8c |
3 × 4b |
3 × 8c |
| [p] C2221 |
a, pb, c |
x, (1/p)y, z; +(0, (u/p), 0) |
4a; (1/2)(p - 1) × 8c |
p × 4b |
p × 8c |
|
p = prime > 2; u = 1, . . ., p - 1 |
|
|
|
| [3] C2221 |
a, b, 3c |
x, y, (1/3)z; ±(0, 0, (1/3)) |
4a; 8c |
4b; 8c |
3 × 8c |
| [p] C2221 |
a, b, pc |
x, y, (1/p)z; +(0, 0, (u/p)) |
4a; (1/2)(p - 1) × 8c |
4b; (1/2)(p - 1) × 8c |
p × 8c |
|
p = prime > 2; u = 1, . . ., p - 1 |
|
|
|
