[script p]11m m Rectangular
No. 4 [script p]11m Patterson symmetry [script p]2mm

symmetry group diagram

Origin on m

Asymmetric unit 0 ≤ x ≤ 1; 0 ≤ y

Symmetry operations

(1)  1   (2)  m   x, 0  

Generators selected (1); t(1); (2)

Positions

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

Symmetry of special projections

Along [10]   m

Origin at x, 0 		Along [01]   [script p]1
a' = a   
Origin at 0, y

Maximal non-isotypic subgroups

I[2] [script p]1 (1)1
IIa none
IIb[2] [script p]11g  (a' = 2a) (5)

Maximal isotypic subgroups of lowest index

IIc[2] [script p]11m  (a' = 2a) (4)

Minimal non-isotypic supergroups

I[2] [script p]2mm (6)
IInone








































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