Origin at 422 at 4/n22/g at -1/4, -1/4, 0 from centre (2/m)
Asymmetric unit |
0 ≤ x ≤ 1/2; 0 ≤ y ≤ 1/2; y ≤ 1/2 - x; 0 ≤ z |
(1) 1 |
(2) 2 0, 0, z |
(3) 4+ 0, 0, z |
(4) 4- 0, 0, z |
(5) 2 0, y, 0 |
(6) 2 x, 0, 0 |
(7) 2 x, x, 0 |
(8) 2 x, -x, 0 |
(9) -1 1/4, 1/4, 0 |
(10) n(1/2, 1/2, 0) x, y, 0 |
(11) -4+ 1/2, 0, z; 1/2, 0, 0 |
(12) -4- 1/2, 0, z; 1/2, 0, 0 |
(13) a x, 1/4, z |
(14) b 1/4, y, z |
(15) m x +1/2, -x, z |
(16) g(1/2, 1/2, 0) x, x, z |
Generators selected (1); t(1, 0, 0); t(0, 1, 0); (2); (3); (5); (9)
Multiplicity, Wyckoff letter,
Site symmetry |
Coordinates |
Reflection conditions |
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General:
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(1) x, y, z |
(2) -x, -y, z |
(3) -y, x, z |
(4) y, -x, z |
(5) -x, y, -z |
(6) x, -y, -z |
(7) y, x, -z |
(8) -y, -x, -z |
(9) -x + 1/2, -y + 1/2, -z |
(10) x + 1/2, y + 1/2, -z |
(11) y + 1/2, -x + 1/2, -z |
(12) -y + 1/2, x + 1/2, -z |
(13) x + 1/2, -y + 1/2, z |
(14) -x + 1/2, y + 1/2, z |
(15) -y + 1/2, -x + 1/2, z |
(16) y + 1/2, x + 1/2, z |
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hk: h + k = 2n
0k: k = 2n
h0: h = 2n
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Special: as above, plus |
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x, x + 1/2, z |
-x, -x + 1/2, z |
-x + 1/2, x, z |
x + 1/2, -x, z |
-x, x + 1/2, -z |
x, -x + 1/2, -z |
x + 1/2, x, -z |
-x + 1/2, -x, -z |
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no extra conditions |
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x, 0, 0 |
-x, 0, 0 |
0, x, 0 |
0, -x, 0 |
-x + 1/2, 1/2, 0 |
x + 1/2, 1/2, 0 |
1/2, -x + 1/2, 0 |
1/2, x + 1/2, 0 |
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no extra conditions |
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x, x, 0 |
-x, -x, 0 |
-x, x, 0 |
x, -x, 0 |
-x + 1/2, -x + 1/2, 0 |
x + 1/2, x + 1/2, 0 |
x + 1/2, -x + 1/2, 0 |
-x + 1/2, x + 1/2, 0 |
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no extra conditions |
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0, 1/2, z |
1/2, 0, z |
0, 1/2, -z |
1/2, 0, -z |
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no extra conditions |
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0, 0, z |
0, 0, -z |
1/2, 1/2, -z |
1/2, 1/2, z |
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no extra conditions |
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1/4, 1/4, 0 |
3/4, 3/4, 0 |
3/4, 1/4, 0 |
1/4, 3/4, 0 |
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hk: h, k = 2n
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no extra conditions |
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no extra conditions |
Symmetry of special projections
Along [001] p4mm
a' = 1/2(a - b) b' = 1/2(a + b)
Origin at 0, 0, z |
Along [100] 2mm
a' = 1/2b
Origin at x, 0, 0 |
Along [110] 2mm
a' = 1/2(-a + b)
Origin at x, x, 0 |
Maximal non-isotypic subgroups
I |
[2] p-4b2 (60) |
1; 2; 7; 8; 11; 12; 13; 14 |
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[2] p-42m (57) |
1; 2; 5; 6; 11; 12; 15; 16 |
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[2] p4bm (56) |
1; 2; 3; 4; 13; 14; 15; 16 |
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[2] p422 (53) |
1; 2; 3; 4; 5; 6; 7; 8 |
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[2] p4/n11 (p4/n, 52) |
1; 2; 3; 4; 9; 10; 11; 12 |
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[2] p2/n12/m (cmme, 48) |
1; 2; 7; 8; 9; 10; 15; 16 |
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[2] p2/n2/b1 (pban, 39) |
1; 2; 5; 6; 9; 10; 13; 14 |
Maximal isotypic subgroups of lowest index
IIc |
[9] p4/nbm (a' = 3a, b' = 3b) (62) |
Minimal non-isotypic supergroups
II |
[2] c4/mmm (p4/mmm, 61) |
Origin at centre (2/m) at n(b, a)(21/g, 2/m) at 1/4, 1/4, 0 from 422
Asymmetric unit |
-1/4 ≤ x ≤ 1/4; -1/4 ≤ y ≤ 1/4; x ≤ -y; 0 ≤ z |
(1) 1 |
(2) 2 1/4, 1/4, z |
(3) 4+ 1/4, 1/4, z |
(4) 4- 1/4, 1/4, z |
(5) 2 1/4, y, 0 |
(6) 2 x, 1/4, 0 |
(7) 2 x, x, 0 |
(8) 2 x, -x +1/2, 0 |
(9) -1 0, 0, 0 |
(10) n(1/2, 1/2, 0) x, y, 0 |
(11) -4+ 1/4,-1/4, z; 1/4,-1/4, 0 |
(12) -4- -1/4, 1/4, z; -1/4, 1/4, 0 |
(13) a x, 0, z |
(14) b 0, y, z |
(15) m x, -x, z |
(16) g(1/2, 1/2, 0) x, x, z |
Generators selected (1); t(1, 0, 0); t(0, 1, 0); (2); (3); (5); (9)
Multiplicity, Wyckoff letter,
Site symmetry |
Coordinates |
Reflection conditions |
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|
|
General:
|
|
(1) x, y, z |
(2) -x + 1/2, -y + 1/2, z |
(3) -y + 1/2, x, z |
(4) y, -x + 1/2, z |
(5) -x + 1/2, y, -z |
(6) x, -y + 1/2, -z |
(7) y, x, -z |
(8) -y + 1/2, -x + 1/2, -z |
(9) -x, -y, -z |
(10) x + 1/2, y + 1/2, -z |
(11) y + 1/2, -x, -z |
(12) -y, x + 1/2, -z |
(13) x + 1/2, -y, z |
(14) -x, y + 1/2, z |
(15) -y, -x, z |
(16) y + 1/2, x + 1/2, z |
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hk: h + k = 2n
0k: k = 2n
h0: h = 2n
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|
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Special: as above, plus |
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x, -x, z |
-x + 1/2, x + 1/2, z |
x + 1/2, x, z |
-x, -x + 1/2, z |
-x + 1/2, -x, -z |
x, x + 1/2, -z |
-x, x, -z |
x + 1/2, -x + 1/2, -z |
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no extra conditions |
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x, 1/4, 0 |
-x + 1/2, 1/4, 0 |
1/4, x, 0 |
1/4, -x + 1/2, 0 |
-x, 3/4, 0 |
x + 1/2, 3/4, 0 |
3/4, -x, 0 |
3/4, x + 1/2, 0 |
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no extra conditions |
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x, x, 0 |
-x + 1/2, -x + 1/2, 0 |
-x + 1/2, x, 0 |
x, -x + 1/2, 0 |
-x, -x, 0 |
x + 1/2, x + 1/2, 0 |
x + 1/2, -x, 0 |
-x, x + 1/2, 0 |
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no extra conditions |
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3/4, 1/4, z |
1/4, 3/4, z |
3/4, 1/4, -z |
1/4, 3/4, -z |
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no extra conditions |
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1/4, 1/4, z |
1/4, 1/4, -z |
3/4, 3/4, -z |
3/4, 3/4, z |
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no extra conditions |
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0, 0, 0 |
1/2, 1/2, 0 |
1/2, 0, 0 |
0, 1/2, 0 |
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hk: h, k = 2n
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no extra conditions |
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no extra conditions |
Symmetry of special projections
Along [001] p4mm
a' = 1/2(a - b) b' = 1/2(a + b)
Origin at 1/4, 1/4, z |
Along [100] 2mm
a' = 1/2b
Origin at x, 0, 0 |
Along [110] 2mm
a' = 1/2(-a + b)
Origin at x, x, 0 |
Maximal non-isotypic subgroups
I |
[2] p-4b2 (60) |
1; 2; 7; 8; 11; 12; 13; 14 |
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[2] p-42m (57) |
1; 2; 5; 6; 11; 12; 15; 16 |
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[2] p4bm (56) |
1; 2; 3; 4; 13; 14; 15; 16 |
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[2] p422 (53) |
1; 2; 3; 4; 5; 6; 7; 8 |
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[2] p4/n11 (p4/n, 52) |
1; 2; 3; 4; 9; 10; 11; 12 |
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[2] p2/n12/m (cmme, 48) |
1; 2; 7; 8; 9; 10; 15; 16 |
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[2] p2/n2/b1 (pban, 39) |
1; 2; 5; 6; 9; 10; 13; 14 |
Maximal isotypic subgroups of lowest index
IIc |
[9] p4/nbm (a' = 3a, b' = 3b) (62) |
Minimal non-isotypic supergroups
II |
[2] c4/mmm (p4/mmm, 61) |