Pca21 No. 29 C2v5


Axes Coordinates Wyckoff positions
4a
I Maximal translationengleiche subgroups
[2] Pc11 (7) x + (1/4), y, z 2 × 2a
[conventional setting]P1c1 -b, a, c, -y, x + (1/4), z
[2] P1a1 (7) 2 × 2a
[2] P1121 (4) 2 × 2a
II Maximal klassengleiche subgroups
   Enlarged unit cell, non-isomorphic
[2] Pna21 (33) a, 2b, c x, (1/2)y, z; +(0, (1/2), 0) 2 × 4a
[2] Pna21 (33) a, 2b, c x, (1/2)y + (1/4), z; +(0, (1/2), 0) 2 × 4a
   Enlarged unit cell, isomorphic
[3] Pca21 3a, b, c (1/3)x, y, z; ±((1/3), 0, 0) 3 × 4a
[p] Pca21 pa, b, c (1/p)x, y, z; +((u/p), 0, 0) p × 4a
p = prime > 2; u = 1, . . ., p - 1
[2] Pca21 a, 2b, c x, (1/2)y, z; +(0, (1/2), 0) 2 × 4a
[2] Pca21 a, 2b, c x, (1/2)y + (1/4), z; +(0, (1/2), 0) 2 × 4a
[3] Pca21 a, 3b, c x, (1/3)y, z; ±(0, (1/3), 0) 3 × 4a
[p] Pca21 a, pb, c x, (1/p) y, z; +(0, (u/p), 0) p × 4a
p = prime; u = 1, . . ., p - 1
[3] Pca21 a, b, 3c x, y, (1/3)z; ±(0, 0, (1/3)) 3 × 4a
[p] Pca21 a, b, pc x, y, (1/p)z; +(0, 0, (u/p)) p × 4a
p = prime > 2; u = 1, . . ., p - 1


Nonconventional settings
        interchange letters and sequences in Hermann-Mauguin symbols, axes and coordinates:
P21ab a→ b → c → a a → b → c → a x→ y → z → x
Pc21b a← b ← c ← a a← b ← c ← a x← y ← z ← x
Pbc21 a<-> b a<-> -b x<-> -y
P21ca a<-> c a<-> -c x<-> -z
Pb21a b<-> c b<-> -c y<-> -z









































to end of page
to top of page