Pba2 C2v8 mm2 Orthorhombic info
No. 32 Pba2 Patterson symmetry Pmmm

symmetry group diagram

Origin on 1 1 2

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

Symmetry operations

(1)  1   (2)  2   0, 0, z(3)  a   x1/4z(4)  b   1/4yz

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 c 1
(1) xyz(2) -x-yz(3) x + 1/2-y + 1/2z(4) -x + 1/2y + 1/2z
0kl: k = 2n
h0l: h = 2n
h00: h = 2n
0k0: k = 2n
    Special: as above, plus
2 b  . . 2 
0, 1/2z 1/2, 0, z
hkl: h  +  k  =  2n
2 a  . . 2 
0, 0, z 1/21/2z
hkl: h  +  k  =  2n

Symmetry of special projections

Along [001]   p2gg
a' = a   b' = b   
Origin at 0, 0, z
Along [100]   p1m1
a' = 1/2b   b' = c   
Origin at x, 0, 0
Along [010]   p11m
a' = c   b' = 1/2a   
Origin at 0, y, 0








































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