P2 C21 2 Monoclinic info
No. 3 P121 Patterson symmetry P12/m1
UNIQUE AXIS b

symmetry group diagram

Origin on 2

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

Symmetry operations

(1)  1   (2)  2   0, y, 0  

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

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions
 General:
2 e 1
(1) xyz(2) -xy-z
no conditions
    Special: as above, plus
1 d  2 
1/2y1/2
no extra conditions
1 c  2 
1/2y, 0
no extra conditions
1 b  2 
0, y1/2
no extra conditions
1 a  2 
0, y, 0
no extra conditions

Symmetry of special projections

Along [001]   p1m1
a' = ap   b' = b   
Origin at 0, 0, z
Along [100]   p11m
a' = b   b' = cp   
Origin at x, 0, 0
Along [010]   p2
a' = c   b' = a   
Origin at 0, y, 0





P2 C21 2 Monoclinic info
No. 3 P112 Patterson symmetry P112/m
UNIQUE AXIS c

symmetry group diagram

Origin on 2

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

Symmetry operations

(1)  1   (2)  2   0, 0, z

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

Positions

Multiplicity, Wyckoff letter,
Site symmetry
Coordinates Reflection conditions
 General:
2 e 1
(1) xyz(2) -x-yz 
no conditions
    Special: as above, plus
1 d  2 
1/21/2z
no extra conditions
1 c  2 
0, 1/2z
no extra conditions
1 b  2 
1/2, 0, z
no extra conditions
1 a  2 
0, 0, z
no extra conditions

Symmetry of special projections

Along [001]   p2
a' = a   b' = b   
Origin at 0, 0, z
Along [100]   p1m1
a' = bp   b' = c   
Origin at x, 0, 0
Along [010]   p11m
a' = c   b' = ap   
Origin at 0, y, 0








































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