[script p]2mm 2mm Rectangular
No. 6 [script p]2mm Patterson symmetry [script p]2mm

symmetry group diagram

Origin at 2 m m

Asymmetric unit 0 ≤ x1/2; 0 ≤ y

Symmetry operations

(1)  1
      (1 | 0, 0)
(2)  2   0, 0
      (2 | 0, 0)
(3)  m   0, y
      (mx | 0, 0)
(4)  m   x, 0
      (my | 0, 0)

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

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions

 General:
4 f 1
(1) xy(2) -x-y(3) -xy(4) x-y
no conditions
    Special: no extra conditions
2 e . m .
1/2y1/2-y
2 d . m .
0, y0, -y
2 c . . m
x, 0-x, 0
1 b 2 m m
1/2, 0
1 a 2 m m
0, 0

Symmetry of special projections

Along [10]   m

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

Maximal non-isotypic subgroups


I[2] [script p]11m (4)1; 4
 [2] [script p]1m1 (3)1; 3
 [2] [script p]211 (2)1; 2
IIa none
IIb[2] [script p]2mg  (a' = 2a) (7)

Maximal isotypic subgroups of lowest index


IIc[2] [script p]2mm  (a' = 2a) (6)

Minimal non-isotypic supergroups


Inone
IInone








































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