[script p]1121/m 2/m Monoclinic/Rectangular
No. 12 [script p]1121/m Patterson symmetry [script p]112/m

symmetry group diagram

Origin at -1 on 21

Asymmetric unit 0 ≤ z ≤ 1/4

Symmetry operations

(1)  1
      (1 | 0, 0, 0)
(2)  2 (1/2)   0, 0, z
      (2z | 0, 0, 1/2)
(3)  -1   0, 0, 0
      (-1 | 0, 0, 0)
(4)  m   xy1/4
      (mz | 0, 0, 1/2)

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

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions

 General:
4 c 1
(1) xyz(2) -x-yz + 1/2(3) -x-y-z(4) xy-z + 1/2
l: l = 2n
  Special: no extra conditions
2 b  m 
xy1/4-x-y3/4
2 a  -1 
0, 0, 00, 0, 1/2

Symmetry of special projections

Along [001]   211

Origin at 0, 0, z
Along [100]   [script p]2mg
a' = c   
Origin at x, 0, 0
Along [010]   [script p]2mg
a' = c   
Origin at 0, y, 0

Maximal non-isotypic non-enantiomorphic subgroups


I[2] [script p]11m (10)1; 4
 [2] [script p]1121 (9)1; 2
 [2] [script p]-1 (2)1; 3
IIa none
IIbnone

Maximal isotypic subgroups and enantiomorphic subgroups of lowest index


IIc[3] [script p]1121/m (c' = 3c) (12)

Minimal non-isotypic non-enantiomorphic supergroups


I[2] [script p]mcm (22); [3] [script p]63/m (61)
II[2] [script p]112/m (c' = 1/2c) (11)








































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