Pna21 No. 33 C2v9

 Axes Coordinates Wyckoff positions 4a I Maximal translationengleiche subgroups [2] Pn11 (7) x + (1/4), y, z 2 × 2a P1n1 c, a, b z, x + (1/4), y [2] P1a1 (7) x, y + (1/4), z 2 × 2a P1c1 c, b, -a z, x + (1/4), -x [2] P1121 (4) 2 × 2a II Maximal klassengleiche subgroups Enlarged unit cell, isomorphic [3] Pna21 3a, b, c (1/3)x, y, z; ±((1/3), 0, 0) 3 × 4a [p] Pna21 pa, b, c (1/p)x, y, z; +((u/p), 0, 0) p × 4a p = prime > 2; u = 1, . . ., p - 1 [3] Pna21 a, 3b, c x, (1/3)y, z; ±(0, (1/3), 0) 3 × 4a [p] Pna21 a, pb, c x, (1/p)y, z; +(0, (u/p), 0) p × 4a p = prime > 2; u = 1, . . ., p - 1 [3] Pna21 a, b, 3c x, y, (1/3)z; ±(0, 0, (1/3)) 3 × 4a [p] Pna21 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: P21nb a → b; c → a a → b → c → a x→ y → z → x Pc21n b← c ← a a← b ← c ← a x← y ← z ← x Pbn21 a b a -b x -y P21cn a→ c a -c x -z Pn21a b→ c b -c y -z