Pnma No. 62 P21/n21/m21/a D2h16


Axes Coordinates Wyckoff positions
4a 4b 4c 8d
I Maximal translationengleiche subgroups
[2] Pn21a (33) 4a 4a 4a 2 × 4a
[conventional setting]Pna21 a, c, -b x, z, -y
[2] Pnm21 (31) x + (1/4), y + (1/4), z 4b 4b 2 × 2a 2 × 4b
[conventional setting]Pmn21 b, a, -c y + (1/4), x + (1/4), -z
[2] P21ma (26) x, y + (1/4), z + (1/4) 4c 4c 2a; 2b 2 × 4c
[conventional setting]Pmc21 b, c, a y + (1/4), z + (1/4), x
[2] P212121 (19) x, y, z + (1/4) 4a 4a 4a 2 × 4a
[2] P21/n11 (14) 2a; 2b 2c; 2d 4e 2 × 4e
[conventional setting]P121/n1 c, a, b z, x, y
[2] P1121/a (14) 2a; 2b 2c; 2d 4e 2 × 4e
[2] P121/m1 (11) 2a; 2d 2b; 2c 2 × 2e 2 × 4f
II Maximal klassengleiche subgroups
   Enlarged unit cell, isomorphic
[3] Pnma 3a, b, c (1/3)x, y, z; ±((1/3), 0, 0) 4a; 8d 4b; 8d 3 × 4c 3 × 8d
[p] Pnma pa, b, c (1/p)x, y, z; +((u/p), 0, 0) 4a; ((p - 1)/2) × 8d 4b; ((p - 1)/2) × 8d p × 4c p × 8d
p = prime > 2; u = 1, . . ., p - 1
[3] Pnma a, 3b, c x, (1/3)y, z; ±(0, (1/3), 0) 4a; 8d 4b; 8d 4c; 8d 3 × 8d
[p] Pnma a, pb, c x, (1/p)y, z; +(0, (u/p), 0) 4a; ((p - 1)/2) × 8d 4b; ((p - 1)/2) × 8d 4c; ((p - 1)/2) × 8d p × 8d
p = prime > 2; u = 1, . . ., p - 1
[3] Pnma a, b, 3c x, y, (1/3)z; ±(0, 0, (1/3)) 4a; 8d 4b; 8d 3 × 4c 3 × 8d
[p] Pnma a, b, pc x, y, (1/p)z; +(0, 0, (u/p)) 4a; ((p - 1)/2) × 8d 4b; ((p - 1)/2) × 8d p × 4c p × 8d
p = prime > 2; u = 1, . . ., p - 1


Nonconventional settings
        interchange letters and sequences in Hermann-Mauguin symbols, axes and coordinates:
Pbnm a→ b; c → a a→ b → c → a x→ y → z → x
Pmcn a→ c; c → b a← b ← c ← a x← y ← z ← x
Pmnb a<-> b a<-> -b x<-> -y
Pcmn a<-> c a<-> -c x<-> -z
Pnam b<-> c b<-> -c y<-> -z









































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