[script p]cc2 mm2 Orthorhombic
No. 16 [script p]cc2 Patterson symmetry [script p]mmm

symmetry group diagram

Origin on cc2

Asymmetric unit 0 ≤ x; 0 ≤ y; 0 ≤ z ≤ 1

Symmetry operations

(1)  1   (2)  2   0, 0, z(3)  c   x, 0, z(4)  c   0, yz

Generators selected (1); t(0, 0, 1); (2); (3)

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions

 General:
4 b 1
(1) xyz(2) -x-yz(3) x-yz + 1/2(4) -xyz + 1/2
l: l = 2n
  Special: no extra conditions
2 a  . . 2 
0, 0, z0, 0, z + 1/2

Symmetry of special projections

Along [001]   2mm

Origin at 0, 0, z
Along [100]   [script p]11m
a' = 1/2c   
Origin at x, 0, 0
Along [010]   [script p]11m
a' = 1/2c   
Origin at 0, y, 0

Maximal non-isotypic non-enantiomorphic subgroups


I[2] [script p]112 (8)1; 2
 [2] [script p]1c1 ([script p]c11, 5)1; 3
 [2] [script p]c11 (5)1; 4
IIa none
IIbnone

Maximal isotypic subgroups and enantiomorphic subgroups of lowest index


IIc[3] [script p]cc2 (c' = 3c) (16)

Minimal non-isotypic non-enantiomorphic supergroups


I[2] [script p]ccm (21); [2] [script p]42cm (35); [2] [script p]4cc (36); [2] [script p]-42c (38); [3] [script p]6cc (69)
II[2] [script p]mm2 (c' = 1/2c) (15)








































to end of page
to top of page