cc2 mm2 Orthorhombic No. 16 cc2 Patterson symmetry mmm

Origin on cc2

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

Symmetry operations

 (1)  1      (1 | 0, 0, 0) (2)  2   0, 0, z      (2z | 0, 0, 0) (3)  c   x, 0, z      (my | 0, 0, 1/2) (4)  c   0, y, z      (mx | 0, 0, 1/2)

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

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions

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

Symmetry of special projections

 Along [001]   2mmOrigin at 0, 0, z Along [100]   11ma' = 1/2c   Origin at x, 0, 0 Along [010]   11ma' = 1/2c   Origin at 0, y, 0

Maximal non-isotypic non-enantiomorphic subgroups

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

Maximal isotypic subgroups and enantiomorphic subgroups of lowest index

 IIc [3] cc2 (c' = 3c) (16)

Minimal non-isotypic non-enantiomorphic supergroups

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