[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 ≤ x ≤ 1/4

Symmetry operations

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

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

Positions

Multiplicity, Wyckoff letter,
Site symmetry		 Coordinates Reflection conditions
 General:
4 c 1
(1) x, y(2) -x, -y(3) -x + 1/2, y(4) x + 1/2, -y
h : h = 2n
    Special: no extra conditions
2 b . m .
1/4, y3/4, -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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