[script p]2mg 2mm Rectangular
No. 7 [script p]2mg Patterson symmetry [script p]2mm

symmetry group diagram

Origin at 2 1 g

Asymmetric unit 0 ≤ x1/4

Symmetry operations

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

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

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions

 General:
4 c 1
(1) xy(2) -x-y(3) -x + 1/2y(4) x + 1/2-y
h : h = 2n
    Special: no extra conditions
2 b . m .
1/4y3/4-y
2 a 2 . .
0, 01/2, 0

Symmetry of special projections

Along [10]   m

Origin at x, 0
Along [01]   [script p]m
a' = 1/2a   
Origin at 0, y

Maximal non-isotypic subgroups


I[2] [script p]11g (5)1; 4
 [2] [script p]1m1 (3)1; 3
 [2] [script p]211 (2)1; 2
IIa none
IIbnone

Maximal isotypic subgroups of lowest index


IIc[3] [script p]2mg  (a' = 3a) (7)

Minimal non-isotypic supergroups


Inone
II[2] [script p]2mm (a' = 1/2a) (6)








































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