Cmm2 No. 35 C2v11


Axes Coordinates Wyckoff positions
2a 2b 4c 4d 4e 8f
I Maximal translationengleiche subgroups
[2] Cm11 (8) 2a 2a 4b 4b 2 × 2a 2 × 4b
[conventional setting]C1m1 -b, a, c -y, x, z
[2] C1m1 (8) 2a 2a 4b 2 × 2a 4b 2 × 4b
[2] P112 (3) (1/2)(a - b), x - y, x + y, z 1a 1d 1b; 1c 2e 2e 2 × 2e
(1/2)(a + b), c
II Maximal klassengleiche subgroups
   Loss of centring translations
[2] Pba2 (32) 2a 2b 4c 4c 4c 2 × 4c
[2] Pma2 (28) x + (1/4), y + (1/4), z 2c 2c 2a; 2b 4d 2 × 2c 2 × 4d
[2] Pbm2 (28) x + (1/4), y + (1/4), z 2c 2c 2a; 2b 2 × 2c 4d 2 × 4d
[conventional setting]Pma2 b, -a, c y + (1/4), -x - (1/4), z
[2] Pmm2 (25) 1a; 1d 1b; 1c 4i 2e; 2f 2g; 2h 2 × 4i
   Enlarged unit cell, non-isomorphic
[2] Ima2 (46) a, b, 2c x + (1/4), y + (1/4), (1/2)z; +(0, 0, (1/2)) 4b 4b 2 × 4a 8c 2 × 4b 2 × 8c
[2] Ibm2 (46) a, b, 2c x + (1/4), y + (1/4), (1/2)z; +(0, 0, (1/2)) 4b 4b 2 × 4a 2 × 4b 8c 2 × 8c
[conventional setting]Ima2 b, -a, 2c y + (1/4), -x - (1/4), (1/2)z; +(0, 0, (1/2))
[2] Iba2 (45) a, b, 2c x, y, (1/2)z; +(0, 0, (1/2)) 4a 4b 8c 8c 8c 2 × 8c
[2] Imm2 (44) a, b, 2c x, y, (1/2)z; +(0, 0, (1/2)) 2 × 2a 2 × 2b 8e 2 × 4c 2 × 4d 2 × 8e
[2] Ccc2 (37) a, b, 2c x, y, (1/2)z; +(0, 0, (1/2)) 4a 4b 2 × 4c 8d 8d 2 × 8d
[2] Cmc21 (36) a, b, 2c x, y, (1/2)z; +(0, 0, (1/2)) 4a 4a 8b 8b 2 × 4a 2 × 8b
[2] Ccm21 (36) a, b, 2c x, y, (1/2)z; +(0, 0, (1/2)) 4a 4a 8b 2 × 4a 8b 2 × 8b
[conventional setting]Cmc21 b, -a, 2c y, -x, (1/2)z; +(0, 0, (1/2))
   Enlarged unit cell, isomorphic
[3] Cmm2 3a, b, c (1/3)x, y, z; ±((1/3), 0, 0) 2a; 4d 2b; 4d 4c; 8f 3 × 4d 4e; 8f 3 × 8f
[p] Cmm2 pa, b, c (1/p)x, y, z; +((u/p), 0, 0) 2a; ((p - 1)/2) × 4d 2b; ((p - 1)/2) × 4d 4c; ((p - 1)/2) × 8f p × 4d 4e; ((p - 1)/2) × 8f p × 8f
p = prime > 2; u = 1, . . ., p - 1
[3] Cmm2 a, 3b, c x, (1/3)y, z; ±(0, (1/3), 0) 2a; 4e 2b; 4e 4c; 8f 4d; 8f 3 × 4e 3 × 8f
[p] Cmm2 a, pb, c x, (1/p)y, z; +(0, (u/p), 0) 2a; ((p - 1)/2) × 4e 2b; ((p - 1)/2) × 4e 4c; ((p - 1)/2) × 8f 4d; ((p - 1)/2) × 8f p × 4e p × 8f
p = prime > 2; u = 1, . . ., p - 1
[2] Cmm2 a, b, 2c x, y, (1/2)z; +(0, 0, (1/2)) 2 × 2a 2 × 2b 2 × 4c 2 × 4d 2 × 4e 2 × 8f
[3] Cmm2 a, b, 3c x, y, (1/3)z; ±(0, 0, (1/3)) 3 × 2a 3 × 2b 3 × 4c 3 × 4d 3 × 4e 3 × 8f
[p] Cmm2 a, b, pc x, y, (1/p)y; +(0, 0, (u/p)) p × 2a p × 2b p × 4c p × 4d p × 4e p × 8f
p = prime; u = 1, . . ., p - 1


Nonconventional settings
        interchange letters and sequences in Hermann-Mauguin symbols, axes and coordinates:
A2mm C → A a→ b → c → a a→ b → c → a x→ y → z → x
Bm2m C→ B a← b ← c ← a a← b ← c ← a x← y ← z ← x









































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