p2 2 Obliqueinfo
No. 2 p2 Patterson symmetry p2

symmetry group diagram

Origin at 2

Asymmetric unit 0 ≤ x ≤ 1/2; 0 ≤ y ≤ 1

Symmetry operations

(1)  1   (2)  2   0, 0  

Generators selected (1); t(1, 0); t(0, 1); (2)

Positions

Multiplicity, Wyckoff letter,
Site symmetry		 Coordinates Reflection conditions
 General:
2 e 1
(1) x, y(2) -x, -y
no conditions
    Special: as above, plus
1 d  2   
1/2, 1/2
no extra conditions
1 c  2   
1/2, 0
no extra conditions
1 b  2   
0, 1/2
no extra conditions
1 a  2   
0, 0
no extra conditions

Maximal non-isomorphic subgroups

I[2] p1 (1)1
IIa none
IIbnone

Maximal isomorphic subgroups of lowest index

IIc[2] p2 (a' = 2a or b' = 2b or a' = a + b, b' = -a + b) (2)

Minimal non-isomorphic supergroups

I[2] p2mm (6); [2] p2mg (7); [2] p2gg (8); [2] c2mm (9); [2] p4 (10); [3] p6 (16)
IInone








































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