Origin on mirror plane m

Asymmetric unit

0 ≤ x ≤ 1/2; 0 ≤ y ≤ 1

(1)  1

(2)  m   0, y, z

Generators selected (1); t(1, 0, 0); t(0, 1, 0); (2)

Positions

Multiplicity, Wyckoff letter, Site symmetry	Coordinates	Reflection conditions
		General:
2 c 1	(1) x, y, z (2) -x, y, z	no conditions

		Special: no extra conditions
1 b  m	1/2, y, z
1 a  m	0, y, z

Symmetry of special projections

Along [001]   p1m1 a' = a   b' = bp    Origin at 0, 0, z

Along [100]   111 a' = b    Origin at x, 0, 0

Along [010]   1m1 a' = a    Origin at 0, y, 0

Maximal non-isotypic subgroups

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I

[2] p1 (1)

1

IIa

none

IIb	[2] cm11 (a' = 2a, b' = 2b) (13); [2] pb11 (b' = 2b) (12)

Maximal isotypic subgroups of lowest index

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IIc	[2] pm11 (a' = 2a) (11); [2] pm11 (b' = 2b) (11)

Minimal non-isotypic supergroups

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I	[2] p2/m11 (14); [2] p21/m11 (15); [2] pmm2 (23); [2] pma2 (24); [2] pm2m (27); [2] pm21b (28); [2] pm2a (31); [2] pm21n (32)

II	[2] cm11 (13)

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