Origin at -1

Asymmetric unit

0 ≤ x ≤ 1/2; 0 ≤ y ≤ 1

(1)  1

(2)  -1   0, 0, 0

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

Positions

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

		Special: no extra conditions
1 d  -1	1/2, 1/2, 0
1 c  -1	1/2, 0, 0
1 b  -1	0, 1/2, 0
1 a  -1	0, 0, 0

Symmetry of special projections

Along [001]   p2 a' = ap   b' = bp    Origin at 0, 0, z

Along [100]   211 a' = bp    Origin at x, 0, 0

Along [010]   211 a' = ap    Origin at 0, y, 0

Maximal non-isotypic subgroups

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I

[2] p1 (1)

1

IIa

none

IIb

none

Maximal isotypic subgroups of lowest index

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IIc	[2] p-1 (a' = 2a or b' = 2b or a' = a + b, b' = -a + b) (2)

Minimal non-isotypic supergroups

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I	[2] p112/m (6); [2] p112/a (7); [2] p2/m11 (14); [2] p21/m11 (15); [2] p2/b11 (16); [2] p21/b11 (17); [2] c2/m11 (18); [3] p-3 (66)

II

none

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