[script p]3m1 3m1 Trigonal
No. 49 [script p]3m1 Patterson symmetry [script p]-3m1
FIRST SETTING

symmetry group diagram

Origin on 3m1

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

Symmetry operations

(1)  1   (2)  3+   0, 0, z(3)  3-   0, 0, z
(4)  m   x, -x, z(5)  m   x, 2x, z(6)  m   2x, x, z

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

Positions

Multiplicity, Wyckoff letter,
Site symmetry		 Coordinates Reflection conditions
 General:
6 c 1
(1) x, y, z(2) -y, x - y, z(3) -x + y, -x, z
(4) -y, -x, z(5) -x + y, y, z(6) x, x - y, z
no conditions
  Special: no extra conditions
3 b  . m . 
x, -x, zx, 2x, z-(2x), -x, z
1 a  3 m . 
0, 0, z

Symmetry of special projections

Along [001]   3m

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

Maximal non-isotypic non-enantiomorphic subgroups

I[2] [script p]311 ([script p]3, 42)1; 2; 3
 [3] [script p]1m1 ([script p]m11, 4)1; 4
 [3] [script p]1m1 ([script p]m11, 4)1; 5
 [3] [script p]1m1 ([script p]m11, 4)1; 6
IIa none
IIb[2] [script p]3c1 (c' = 2c) (50)

Maximal isotypic subgroups and enantiomorphic subgroups of lowest index

IIc[2] [script p]3m1 (c' = 2c) (49)

Minimal non-isotypic non-enantiomorphic supergroups

I[2] [script p]-31m (51); [2] [script p]6mm (68); [2] [script p]63mc (70); [2] [script p]-6m2 (71)
IInone








































to end of page
to top of page