P2/m C2h1 2/m Monoclinic info
No. 10 P12/m1 Patterson symmetry P12/m1
UNIQUE AXIS b

symmetry group diagram

Origin at centre (2/m)

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

Symmetry operations

(1)  1   (2)  2   0, y, 0(3)  -1   0, 0, 0(4)  m   x, 0, z

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

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions
 General:
4 o 1
(1) xyz(2) -xy-z(3) -x-y-z(4) x-yz
no conditions
    Special: as above, plus
2 n  m 
x1/2z -x1/2-z
no extra conditions
2 m  m 
x, 0, z -x, 0, -z
no extra conditions
2 l  2 
1/2y1/2 1/2-y1/2
no extra conditions
2 k  2 
0, y1/2 0, -y1/2
no extra conditions
2 j  2 
1/2y, 0 1/2-y, 0
no extra conditions
2 i  2 
0, y, 0 0, -y, 0
no extra conditions
1 h  2/m 
1/21/21/2
no extra conditions
1 g  2/m 
1/2, 0, 1/2
no extra conditions
1 f  2/m 
0, 1/21/2
no extra conditions
1 e  2/m 
1/21/2, 0
no extra conditions
1 d  2/m 
1/2, 0, 0
no extra conditions
1 c  2/m 
0, 0, 1/2
no extra conditions
1 b  2/m 
0, 1/2, 0
no extra conditions
1 a  2/m 
0, 0, 0
no extra conditions

Symmetry of special projections

Along [001]   p2mm
a' = ap   b' = b   
Origin at 0, 0, z
Along [100]   p2mm
a' = b   b' = cp   
Origin at x, 0, 0
Along [010]   p2
a' = c   b' = a   
Origin at 0, y, 0





P2/m C2h1 2/m Monoclinic info
No. 10 P112/m Patterson symmetry P112/m
UNIQUE AXIS c

symmetry group diagram

Origin at centre (2/m)

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

Symmetry operations

(1)  1   (2)  2   0, 0, z(3)  -1   0, 0, 0(4)  m   xy, 0

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

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions
 General:
4 o 1
(1) xyz(2) -x-yz(3) -x-y-z(4) xy-z
no conditions
    Special: as above, plus
2 n  m 
xy1/2 -x-y1/2
no extra conditions
2 m  m 
xy, 0 -x-y, 0
no extra conditions
2 l  2 
1/21/2z 1/21/2-z
no extra conditions
2 k  2 
1/2, 0, z 1/2, 0, -z
no extra conditions
2 j  2 
0, 1/2z 0, 1/2-z
no extra conditions
2 i  2 
0, 0, z 0, 0, -z
no extra conditions
1 h  2/m 
1/21/21/2
no extra conditions
1 g  2/m 
1/21/2, 0
no extra conditions
1 f  2/m 
1/2, 0, 1/2
no extra conditions
1 e  2/m 
0, 1/21/2
no extra conditions
1 d  2/m 
0, 1/2, 0
no extra conditions
1 c  2/m 
1/2, 0, 0
no extra conditions
1 b  2/m 
0, 0, 1/2
no extra conditions
1 a  2/m 
0, 0, 0
no extra conditions

Symmetry of special projections

Along [001]   p2
a' = a   b' = b   
Origin at 0, 0, z
Along [100]   p2mm
a' = bp   b' = c   
Origin at x, 0, 0
Along [010]   p2mm
a' = c   b' = ap   
Origin at 0, y, 0








































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