[script p]6cc 6mm Hexagonal
No. 69 [script p]6cc Patterson symmetry [script p]6/mmm

symmetry group diagram

Origin on 6cc

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

Symmetry operations

(1)  1   (2)  3+   0, 0, z(3)  3-   0, 0, z
(4)  2   0, 0, z(5)  6-   0, 0, z(6)  6+   0, 0, z
(7)  c   x, -x, z(8)  c   x, 2x, z(9)  c   2x, x, z
(10)  c   x, x, z(11)  c   x, 0, z(12)  c   0, y, z

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

Positions

Multiplicity, Wyckoff letter,
Site symmetry		 Coordinates Reflection conditions
 General:
12 b 1
(1) x, y, z(2) -y, x - y, z(3) -x + y, -x, z
(4) -x, -y, z(5) y, -x + y, z(6) x - y, x, z
(7) -y, -x, z + 1/2(8) -x + y, y, z + 1/2(9) x, x - y, z + 1/2
(10) y, x, z + 1/2(11) x - y, -y, z + 1/2(12) -x, -x + y, z + 1/2
l: l = 2n
  Special: no extra conditions
2 a  6 . . 
0, 0, z0, 0, z + 1/2

Symmetry of special projections

Along [001]   6mm

Origin at 0, 0, z 		Along [100]   [script p]11m
a' = 1/2c   
Origin at x, 0, 0 		Along [210]   [script p]11m
a' = 1/2c   
Origin at x, 1/2x, 0

Maximal non-isotypic non-enantiomorphic subgroups

I[2] [script p]611 ([script p]6, 53)1; 2; 3; 4; 5; 6
 [2] [script p]3c1 (50)1; 2; 3; 7; 8; 9
 [2] [script p]31c ([script p]3c1, 50)1; 2; 3; 10; 11; 12
 [3] [script p]2cc ([script p]cc2, 16)1; 4; 7; 10
 [3] [script p]2cc ([script p]cc2, 16)1; 4; 8; 11
 [3] [script p]2cc ([script p]cc2, 16)1; 4; 9; 12
IIa none
IIbnone

Maximal isotypic subgroups and enantiomorphic subgroups of lowest index

IIc[3] [script p]6cc (c' = 3c) (69)

Minimal non-isotypic non-enantiomorphic supergroups

I[2] [script p]6/mcc (74)
II[2] [script p]6mm (c' = 1/2c) (68)








































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