|
Axes |
Coordinates |
Wyckoff positions |
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4a |
4b |
4c |
8d |
| I Maximal translationengleiche subgroups |
| [2] Cc11 (9) |
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4a |
4a |
4a |
2 × 4a |
![[conventional setting]](/graphics/sg/Wconv.gif) C1c1 |
b, -a, c |
y, -x, z |
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| [2] C1c1 (9) |
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4a |
4a |
4a |
2 × 4a |
| [2] P112 (3) |
a, (1/2)(-a + b), c |
x + y, 2y, z |
2 × 1a |
2 × 1b |
1c; 1d |
2 × 2e |
| or: |
(1/2)(a - b), (1/2)(a + b), c |
x - y, x + y, z |
2 × 1a |
2 × 1d |
1b; 1c |
2 × 2e |
| II Maximal klassengleiche subgroups |
| Loss of centring translations |
| [2] Pnn2 (34) |
|
|
2 × 2a |
2 × 2b |
4c |
2 × 4c |
| [2] Pnc2 (30) |
|
x + (1/4), y + (1/4), z |
4c |
4c |
2a; 2b |
2 × 4c |
| [2] Pcn2 (30) |
|
x + (1/4), y + (1/4), z |
4c |
4c |
2a; 2b |
2 × 4c |
| Pnc2 |
b -a, c |
y + (1/4), -x - (1/4), z |
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| [2] Pcc2 (27) |
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2a; 2d |
2b; 2c |
4e |
2 × 4e |
| Enlarged unit cell, isomorphic |
| [3] Ccc2 |
3a, b, c |
(1/3)x, y, z; ±((1/3), 0, 0) |
4a; 8d |
4b; 8d |
4c; 8d |
3 × 8d |
| [p] Ccc2 |
pa, b, c |
(1/p)x, y, z; +((u/p), 0, 0) |
4a; ((p - 1)/2) × 8d |
4b; ((p - 1)/2) × 8d |
4c; ((p - 1)/2) × 8d |
p × 8d |
|
p = prime > 2; u = 1, . . ., p - 1 |
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| [3] Ccc2 |
a, 3b, c |
x, (1/3)y, z; ±(0, (1/3), 0) |
4a; 8d |
4b; 8d |
4c; 8d |
3 × 8d |
| [p] Ccc2 |
a, pb, c |
x, (1/p)y, z; +(0, (u/p), 0) |
4a; ((p - 1)/2) × 8d |
4b; ((p - 1)/2) × 8d |
4c; ((p - 1)/2) × 8d |
p × 8d |
|
p = prime > 2; u = 1, . . ., p - 1 |
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|
| [3] Ccc2 |
a, b, 3c |
x, y, (1/3)z; ±(0, 0, (1/3)) |
3 × 4a |
3 × 4b |
3 × 4c |
3 × 8d |
| [p] Ccc2 |
a, b, pc |
x, y, (1/p)z; +(0, 0, (u/p)) |
p × 4a |
p × 4b |
p × 4c |
p × 8d |
|
p = prime > 2; u = 1, . . ., p - 1 |
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