[script p]4 4 Tetragonal
No. 23 [script p]4 Patterson symmetry [script p]4/m

symmetry group diagram

Origin on 4

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

Symmetry operations

(1)  1   (2)  2   0, 0, z(3)  4+   0, 0, z(4)  4-   0, 0, z

Generators selected (1); t(0, 0, 1); (2); (3)

Positions

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

Symmetry of special projections

Along [001]   4

Origin at 0, 0, z 		Along [100]   [script p]11m
a' = c   
Origin at x, 0, 0 		Along [110]   [script p]11m
a' = c   
Origin at x, x, 0

Maximal non-isotypic non-enantiomorphic subgroups

I[2] [script p]112 (8)1; 2
IIa none
IIb[2] [script p]42 (c' = 2c) (25)

Maximal isotypic subgroups and enantiomorphic subgroups of lowest index

IIc[2] [script p]4 (c' = 2c) (23)

Minimal non-isotypic non-enantiomorphic supergroups

I[2] [script p]4/m (28); [2] [script p]422 (30); [2] [script p]4mm (34); [2] [script p]4cc (36)
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