[script p]-31c -31m Trigonal
No. 52 [script p]-312/c Patterson symmetry [script p]-31m
FIRST SETTING

symmetry group diagram

Origin at centre (-3) at -31c

Asymmetric unit 0 ≤ x; 0 ≤ y; 0 ≤ z ≤ 1/4

Symmetry operations

(1)  1   (2)  3+   0, 0, z(3)  3-   0, 0, z
(4)  2   x, -x, 1/4(5)  2   x, 2x, 1/4(6)  2   2x, x, 1/4
(7)  -1   0, 0, 0(8)  -3+   0, 0, z; 0, 0, 0(9)  -3-   0, 0, z; 0, 0, 0
(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 e 1
(1) x, y, z(2) -y, x - y, z(3) -x + y, -x, z
(4) -y, -x, -z + 1/2(5) -x + y, y, -z + 1/2(6) x, x - y, -z + 1/2
(7) -x, -y, -z(8) y, -x + y, -z(9) x - y, x, -z
(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
6 d  . . 2 
x, -x, 1/4x, 2x, 1/4-(2x), -x, 1/4-x, x, 3/4-x, -(2x), 3/42x, x, 3/4
4 c  3 . . 
0, 0, z0, 0, -z + 1/20, 0, -z0, 0, z + 1/2
2 b  -3 . . 
0, 0, 00, 0, 1/2
2 a  3 . 2 
0, 0, 1/40, 0, 3/4

Symmetry of special projections

Along [001]   6mm

Origin at 0, 0, z 		Along [100]   [script p]2mg
a' = c   
Origin at x, 0, 0 		Along [210]   [script p]211
a' = 1/2c   
Origin at x, 1/2x, 0

Maximal non-isotypic non-enantiomorphic subgroups

I[2] [script p]31c ([script p]3c1, 50)1; 2; 3; 10; 11; 12
 [2] [script p]312 (46)1; 2; 3; 4; 5; 6
 [2] [script p]-311 ([script p]-3, 45)1; 2; 3; 7; 8; 9
 [3] [script p]112/c ([script p]2/c11, 7)1; 4; 7; 10
 [3] [script p]112/c ([script p]2/c11, 7)1; 5; 7; 11
 [3] [script p]112/c ([script p]2/c11, 7)1; 6; 7; 12
IIa none
IIbnone

Maximal isotypic subgroups and enantiomorphic subgroups of lowest index

IIc[3] [script p]-31c (c' = 3c) (52)

Minimal non-isotypic non-enantiomorphic supergroups

I[2] [script p]6/mcc (74); [2] [script p]63/mmc (75)
II[2] [script p]-31m (c' = 1/2c) (51)








































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