|
Axes |
Coordinates |
Wyckoff positions |
|
|
|
4a |
4b |
8c |
| I Maximal translationengleiche subgroups |
| [2] Ic11 (9) |
|
|
4a |
4a |
2 × 4a |
![[conventional setting]](/graphics/sg/Wconv.gif) I1a1 |
c, a, b |
z, x, y |
|
|
|
| C1c1 |
-b - c, a, c |
-y, x, -y + z |
|
|
|
| [2] I1c1 (9) |
|
|
4a |
4a |
2 × 4a |
| I1a1 |
|
x, y + (1/4), y |
|
|
|
| C1c1 |
a - c, b, c |
x, y, x + z |
|
|
|
| [2] I112 (5) |
|
|
2 × 2a |
2 × 2b |
2 × 4c |
| A112 |
b, -a - b, c |
x + y, -x, z |
| II Maximal klassengleiche subgroups |
| Loss of centring translations |
| [2] Pba2 (32) |
|
|
2 × 2a |
2 × 2b |
2 × 4c |
| [2] Pca21 (29) |
|
x + (1/4), y + (1/4), z |
4a |
4a |
2 × 4a |
| [2] Pbc21 (29) |
|
x + (1/4), y + (1/4), z |
4a |
4a |
2 × 4a |
| Pca21 |
b, a, -c |
y + (1/4), x + (1/4), -z |
|
|
|
| [2] Pcc2 (27) |
|
|
2a; 2d |
2b; 2c |
2 × 4e |
| Enlarged unit cell, isomorphic |
| [3] Iba2 |
3a, b, c |
(1/3)x, y, z; ±((1/3), 0, 0) |
4a; 8c |
4b; 8c |
3 × 8c |
| [p] Iba2 |
pa, b, c |
(1/p)x, y, z; +((u/p), 0, 0) |
4a; ((p - 1)/2) × 8c |
4b; ((p - 1)/2) × 8c |
p × 8c |
|
p = prime > 2; u = 1, . . ., p - 1 |
|
|
|
| [3] Iba2 |
a, 3b, c |
x, (1/3)y, z; ±(0, (1/3), 0) |
4a; 8c |
4b; 8c |
3 × 8c |
| [p] Iba2 |
a, pb, c |
x, (1/p)y, z; +(0, (u/p), 0) |
4a; ((p - 1)/2) × 8c |
4b; ((p - 1)/2) × 8c |
p × 8c |
|
p = prime > 2; u = 1, . . ., p - 1 |
|
|
|
| [3] Iba2 |
a, b, 3c |
x, y, (1/3)z; ±(0, 0, (1/3)) |
3 × 4a |
3 × 4b |
3 × 8c |
| [p] Iba2 |
a, b, pc |
x, y, (1/p)z; +(0, 0, (u/p)) |
p × 4a |
p × 4b |
p × 8c |
|
p = prime > 2; u = 1, . . ., p - 1 |
|
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