Pca21 C2v5 mm2 Orthorhombic info
No. 29 Pca21 Patterson symmetry Pmmm

symmetry group diagram

Origin on 1 a 21

Asymmetric unit 0 ≤ x ≤ 1/4; 0 ≤ y ≤ 1; 0 ≤ z ≤ 1

Symmetry operations

(1)  1   (2)  2(0, 0, 1/2)   0, 0, z(3)  a   x, 0, z(4)  c   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 a 1
(1) xyz(2) -x-yz + 1/2(3) x + 1/2-yz(4) -x + 1/2yz + 1/2
0kl: l = 2n
h0l: h = 2n
h00: h = 2n
00l: l = 2n

Symmetry of special projections

Along [001]   p2mg
a' = a   b' = b   
Origin at 0, 0, z
Along [100]   p1m1
a' = b   b' = 1/2c   
Origin at x, 0, 0
Along [010]   p11g
a' = c   b' = 1/2a   
Origin at 0, y, 0








































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