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Axes |
Coordinates |
Wyckoff positions |
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2a |
2b |
2c |
2d |
4e |
| I Maximal translationengleiche subgroups |
| [2] Pc11 (7) |
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2a |
2a |
2a |
2a |
2 × 2a |
![[conventional setting]](/graphics/sg/Wconv.gif) P1c1 |
b, a, -c |
y, x, -z |
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| [2] P1c1 (7) |
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2a |
2a |
2a |
2a |
2 × 2a |
| [2] P112 (3) |
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2 × 1a |
2 × 1c |
2 × 1b |
2 × 1d |
2 × 2e |
| II Maximal klassengleiche subgroups |
| Enlarged unit cell, non-isomorphic |
| [2] Ccc2 (37) |
2a, 2b, c |
(1/2)x, (1/2)y, z; +((1/2), 0, 0) |
4a; 4b |
8d |
8d |
2 × 4c |
2 × 8d |
| [2] Ccc2 (37) |
2a, 2b, c |
(1/2)x + (1/4), (1/2)y, z; +((1/2), 0, 0) |
8d |
2 × 4c |
4a; 4b |
8d |
2 × 8d |
| [2] Ccc2 (37) |
2a, 2b, c |
(1/2)x, (1/2)y + (1/4), z; +((1/2), 0, 0) |
8d |
4a; 4b |
2 × 4c |
8d |
2 × 8d |
| [2] Ccc2 (37) |
2a, 2b, c |
(1/2)x + (1/4), (1/2)y + (1/4), z; +((1/2), 0, 0) |
2 × 4c |
8d |
8d |
4a; 4b |
2 × 8d |
| [2] Pcn2 (30) |
2a, b, c |
(1/2)x, y, z; +((1/2), 0, 0) |
2 × 2a |
2 × 2b |
4c |
4c |
2 × 4c |
| Pnc2 |
b, 2a, -c |
y, (1/2)x, -z; +(0, (1/2), 0) |
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| [2] Pcn2 (30) |
2a, b, c |
(1/2)x + (1/4), y, z; +((1/2), 0, 0) |
4c |
4c |
2 × 2a |
2 × 2b |
2 × 4c |
| Pnc2 |
b, 2a, -c |
y, (1/2)x + (1/4), -z; +(0, (1/2), 0) |
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| [2] Pnc2 (30) |
a, 2b, c |
x, (1/2)y, z; +(0, (1/2), 0) |
2 × 2a |
4c |
2 × 2b |
4c |
2 × 4c |
| [2] Pnc2 (30) |
a, 2b, c |
x, (1/2)y + (1/4), z; +(0, (1/2), 0) |
4c |
2 × 2a |
4c |
2 × 2b |
2 × 4c |
| Enlarged unit cell, isomorphic |
| [2] Pcc2 |
2a, b, c |
(1/2)x, y, z; +((1/2), 0, 0) |
2a; 2c |
2b; 2d |
4e |
4e |
2 × 4e |
| [2] Pcc2 |
2a, b, c |
(1/2)x + (1/4), y, z; +((1/2), 0, 0) |
4e |
4e |
2a; 2c |
2b; 2d |
2 × 4e |
| [3] Pcc2 |
3a, b, c |
(1/3)x, y, z; ±((1/3), 0, 0) |
2a; 4e |
2b; 4e |
2c; 4e |
2d; 4e |
3 × 4e |
| [p] Pcc2 |
pa, b, c |
(1/p)x, y, z; +((u/p), 0, 0) |
2a; ((p - 1)/2) × 4e |
2b; ((p - 1)/2) × 4e |
2c; ((p - 1)/2) × 4e |
2d; ((p - 1)/2) × 4e |
p × 4e |
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p = prime > 2; u = 1, . . ., p - 1 |
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| [2] Pcc2 |
a, 2b, c |
x, (1/2)y, z; +(0, (1/2), 0) |
2a; 2b |
4e |
2c; 2d |
4e |
2 × 4e |
| [2] Pcc2 |
a, 2b, c |
x, (1/2)y + (1/4), z; +(0, (1/2), 0) |
4e |
2a; 2b |
4e |
2c; 2d |
2 × 4e |
| [3] Pcc2 |
a, 3b, c |
x, (1/3)y, z; ±(0, (1/3), 0) |
2a; 4e |
2b; 4e |
2c; 4e |
2d; 4e |
3 × 4e |
| [p] Pcc2 |
a, pb, c |
x, (1/p)y, z; +(0, (u/p), 0) |
2a; ((p - 1)/2) × 4e |
2b; ((p - 1)/2) × 4e |
2c; ((p - 1)/2) × 4e |
2d; ((p - 1)/2) × 4e |
p × 4e |
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p = prime > 2; u = 1, . . ., p - 1 |
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| [3] Pcc2 |
a, b, 3c |
x, y, (1/3)z; ±(0, 0, (1/3)) |
3 × 2a |
3 × 2b |
3 × 2c |
3 × 2d |
3 × 4e |
| [p] Pcc2 |
a, b, pc |
x, y, (1/p)z; +(0, 0, (u/p)) |
p × 2a |
p × 2b |
p × 2c |
p × 2d |
p × 4e |
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p = prime > 2; u = 1, . . ., p - 1 |
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