[script p]1m1 m Rectangular
No. 3 [script p]1m1 Patterson symmetry [script p]2mm

symmetry group diagram

Origin on m

Asymmetric unit 0 ≤ x ≤ 1/2

Symmetry operations

(1)  1   (2)  m   0, y  

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

Positions

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

Symmetry of special projections

Along [10]   1

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

Maximal non-isotypic subgroups

I[2] [script p]1 (1)1
IIa none
IIbnone

Maximal isotypic subgroups of lowest index

IIc[2] [script p]1m1  (a' = 2a) (3)

Minimal non-isotypic supergroups

I[2] [script p]2mm (6); [2] [script p]2mg (7)
IInone








































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