[script p]-6m2 -6m2 Hexagonal
No. 71 [script p]-6m2 Patterson symmetry [script p]6/mmm
FIRST SETTING

symmetry group diagram

Origin on -6m2

Asymmetric unit y ≤ x/2; -x ≤ y; 0 ≤ z ≤ 1/2

Symmetry operations

(1)  1   (2)  3+   0, 0, z(3)  3-   0, 0, z
(4)  m   xy, 0(5)  -6-   0, 0, z; 0, 0, 0(6)  -6+   0, 0, z; 0, 0, 0
(7)  m   x-xz(8)  m   x, 2xz(9)  m   2xxz
(10)  2   x-x, 0(11)  2   x, 2x, 0(12)  2   2xx, 0

Generators selected (1); t(0, 0, 1); (2); (4); (7)

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions

 General:
12 i 1
(1) xyz(2) -yx - yz(3) -x + y-xz
(4) xy-z(5) -yx - y-z(6) -x + y-x-z
(7) -y-xz(8) -x + yyz(9) xx - yz
(10) -y-x-z(11) -x + yy-z(12) xx - y-z
no conditions
  Special: no extra conditions
6 h  . m . 
x-xzx, 2xz-(2x), -xzx-x-zx, 2x-z-(2x), -x-z
6 g  m . . 
xy1/2-yx - y1/2-x + y-x1/2-y-x1/2-x + yy1/2xx - y1/2
6 f  m . . 
xy, 0-yx - y, 0-x + y-x, 0-y-x, 0-x + yy, 0xx - y, 0
3 e  m m 2 
x-x1/2x, 2x1/2-(2x), -x1/2
3 d  m m 2 
x-x, 0x, 2x, 0-(2x), -x, 0
2 c  3 m . 
0, 0, z0, 0, -z
1 b  -6 m 2 
0, 0, 1/2
1 a  -6 m 2 
0, 0, 0

Symmetry of special projections

Along [001]   3m

Origin at 0, 0, z
Along [100]   [script p]1m1
a' = c   
Origin at x, 0, 0
Along [210]   [script p]2mm
a' = c   
Origin at x1/2x, 0

Maximal non-isotypic non-enantiomorphic subgroups


I[2] [script p]-611 ([script p]-6, 59)1; 2; 3; 4; 5; 6
 [2] [script p]3m1 (49)1; 2; 3; 7; 8; 9
 [2] [script p]312 (46)1; 2; 3; 10; 11; 12
 [3] [script p]mm2 ([script p]2mm, 18)1; 4; 7; 10
 [3] [script p]mm2 ([script p]2mm, 18)1; 4; 8; 11
 [3] [script p]mm2 ([script p]2mm, 18)1; 4; 9; 12
IIa none
IIb[2] [script p]-6c2 (c' = 2c) (72)

Maximal isotypic subgroups and enantiomorphic subgroups of lowest index


IIc[2] [script p]-6m2 (c' = 2c) (71)

Minimal non-isotypic non-enantiomorphic supergroups


I[2] [script p]6/mmm (73); [2] [script p]63/mmc (75)
IInone








































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