|
Axes |
Coordinates |
Wyckoff positions |
|
|
|
2a |
2b |
2c |
2d |
4e |
4f |
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|
|
6g |
6h |
12i |
12j |
12k |
24l |
I Maximal translationengleiche subgroups |
[2] P-62c |
|
|
2a |
2b |
2c |
2d |
4e |
4f |
(190) |
|
|
6g |
6h |
2 × 6g |
2 × 6h |
12i |
2 × 12i |
[2] P-6m2 |
|
x, y, z + (1/4) |
2g |
1a; 1b |
1d; 1e |
1c; 1f |
2 × 2g |
2h; 2i |
(187) |
|
|
6n |
3j; 3k |
12o |
6l; 6m |
2 × 6n |
2 × 12o |
[2] P63mc |
|
|
2a |
2a |
2b |
2b |
2 × 2a |
2 × 2b |
(186) |
|
|
6c |
6c |
12d |
12d |
2 × 6c |
2 × 12d |
[2] P6322 |
|
|
2a |
2b |
2c |
2d |
4e |
4f |
(182) |
|
|
6g |
6h |
2 × 6g |
12i |
12i |
2 × 12i |
[2] P63/m |
|
|
2b |
2a |
2c |
2d |
4e |
4f |
(176) |
|
|
6g |
6h |
12i |
2 × 6h |
12i |
2 × 12i |
[2] P-3m1 |
|
|
1a; 1b |
2c |
2d |
2d |
2 × 2c |
2 × 2d |
(164) |
|
|
3e; 3f |
6i |
6g; 6h |
12j |
2 × 6i |
2 × 12j |
[2] P-31c |
|
|
2b |
2a |
2c |
2d |
4e |
4f |
(163) |
|
|
6g |
6h |
12i |
12i |
12i |
2 × 12i |
[3] Cmcm |
a, a + 2b, c |
x - (1/2)y, (1/2)y, z |
4a |
4c |
4c |
4c |
8f |
8f |
(63) |
|
|
4b; 8d |
4c; 8g |
8e; 16h |
3 × 8g |
8f; 16h |
3 × 16h |
conjugate: |
b, -2a - b, c |
-(1/2)x + y, -(1/2)x, z |
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conjugate: |
-a - b, a - b, c |
-(1/2)(x + y), (1/2)(x - y), z |
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II Maximal klassengleiche subgroups |
Enlarged unit cell, non-isomorphic |
[3] P63/mcm |
2a + b, |
(1/3)(x + y), (1/3)(-x + 2y), |
2b; 4d |
2a; 4c |
6g |
6g |
4e; 8h |
12k |
(193) |
-a + b, c |
z; ±((1/3), (2/3), 0) |
6f; 12i |
6g; 12j |
3 × 12i |
3 × 12j |
12k; 24l |
3 × 24l |
Enlarged unit cell, isomorphic |
[3] P63/mmc |
a, b, 3c |
x, y, (1/3)z; ±(0, 0, (1/3)) |
2a; 4e |
2b; 4e |
2d; 4f |
2c; 4f |
3 × 4e |
3 × 4f |
|
|
|
6g; 12k |
6h; 12k |
12i; 24l |
12j; 24l |
3 × 12k |
3 × 24l |
[p] P63/mmc |
a, b, pc |
x, y, (1/p)z; +(0, 0, (u/p)) |
2a; ((p - 1)/2) × 4e |
2b; ((p - 1)/2) × 4e |
2c(d*); ((p - 1)/2) × |
2d(c*); ((p - 1)/2) × |
p × 4e |
p × 4f |
|
p = prime > 2; |
|
|
4f |
4f |
|
|
|
u = 1. . . p - 1 |
6g; ((p - 1)/2) × 12k |
6h; ((p - 1)/2) × 12k |
12i; ((p - 1)/2) × 24l |
12j; ((p - 1)/2) × 24l |
p × 12k |
p × 24l |
[4] P63/mmc |
2a, 2b, c |
(1/2)x, (1/2)y, z; +((1/2), 0, 0); |
2a; 6g |
2b; 6h |
2d; 6h |
2c; 6h |
4e; 12k |
4f; 12k |
|
|
+(0, (1/2), 0); +((1/2), (1/2), 0) |
12i; 12k |
2 × 6h; 12j |
2 × 12i; 24l |
4 × 12j |
2 × 12k; 24l |
4 × 24l |
[p2] P63/mmc |
pa, pb, c |
(1/p)x, (1/p)y, z; |
2a; ((p - 1)/2) × 12i; |
2b; |
2c(d† ); |
2d(c† ); |
4e; |
4f; |
|
|
+((u/p), (v/p), 0) |
((p - 1)/2) × 12k; |
(p - 1) × 6h; |
(p - 1) × 6h; |
(p - 1) × 6h; |
(p - 1) × 12k; |
(p - 1) × 12k; |
|
p = prime > 4; |
(((p - 1)(p - 5))/12) × |
(((p - 1)(p - 2))/6) × |
(((p - 1)(p - 2))/6) × |
(((p - 1)(p - 2))/6) × |
(((p - 1)(p - 2))/6) × |
(((p - 1)(p - 2))/6) × |
|
u, v = 1, . . ., p - 1 |
24l |
12j |
12j |
12j |
24l |
24l |
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|
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6g; ((p - 1)/2) × 12i; |
p × 6h; |
p × 12i; |
p2 × 12j |
p × 12k; |
p2 × 24l |
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((p - 1)/2) × 12k; |
((p(p - 1))/2) × 12j |
((p(p - 1))/2) × 24l |
|
((p(p - 1))/2) × 24l |
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(((p - 1)2)/4) × 24l |
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* p = 4n - 1 |
† p = 6n - 1 |