Origin on 3 on 63
Asymmetric unit | 0 ≤ x ≤ 2/3; 0 ≤ y ≤ 2/3; 0 ≤ z ≤ 1/2; x ≤ (1 + y)/2; y ≤ min(1 - x, (1 + x)/2) | ||||||||||
Vertices |
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Symmetry operations
(1) 1 | (2) 3+ 0, 0, z | (3) 3- 0, 0, z |
(4) 2(0, 0, 1/2) 0, 0, z | (5) 6-(0, 0, 1/2) 0, 0, z | (6) 6+(0, 0, 1/2) 0, 0, z |
Generators selected (1); t(1, 0, 0); t(0, 1, 0); t(0, 0, 1); (2); (4)
Positions
Multiplicity, Wyckoff letter, Site symmetry | Coordinates | Reflection conditions | |||||||||
General: | |||||||||||
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| 000l : l = 2n |
Special: as above, plus | |||||||
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| hkil : l = 2n or h - k = 3n + 1 or h - k = 3n + 2 | |||||
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| hkil : l = 2n |
Symmetry of special projections
Along [001] p6 a' = a b' = b Origin at 0, 0, z | Along [100] p1g1 a' = 1/2(a + 2b) b' = c Origin at x, 0, 0 | Along [210] p1g1 a' = 1/2b b' = c Origin at x, 1/2x, 0 |
Maximal non-isomorphic subgroups
I | [2] P3 (143) | 1; 2; 3 | |
[3] P21 (4) | 1; 4 |
IIa | none |
IIb | [3] P65 (c' = 3c) (170); [3] P61 (c' = 3c) (169) |
Maximal isomorphic subgroups of lowest index
IIc | [3] P63 (c' = 3c) (173); [3] H63 (a' = 3a, b' = 3b) (P63, 173) |
Minimal non-isomorphic supergroups
I | [2] P63/m (176); [2] P6322 (182); [2] P63cm (185); [2] P63mc (186) |
II | [2] P6 (c' = 1/2c) (168) |