Information of spin space group $P\ce{^{1}{2_{1}}}\ce{^{1}{2_{1}}}\ce{^{1}{2}}\ce{^{\text{-}1}{(1/2 \ 1/2 \ 0)}}\ce{^{\infty m}{1}}$ ( nSSG:18.21.2.1 )

General Positions

The continuously infinite group ^∞1 is omitted.

Coordinates	Seitz symbol
a, b, c | x, y, z	{ 1 ‖ 1 | 0 }
a+1/2, -b+1/2, -c | x, y, z	{ 1 ‖ 2100 | 1/2 1/2 0 }
-a+1/2, b+1/2, -c | x, y, z	{ 1 ‖ 2010 | 1/2 1/2 0 }
-a, -b, c | x, y, z	{ 1 ‖ 2001 | 0 }
a+1/2, b+1/2, c | -x, -y, -z	{ -1 ‖ 1 | 1/2 1/2 0 }
a, -b, -c | -x, -y, -z	{ -1 ‖ 2100 | 0 }
-a, b, -c | -x, -y, -z	{ -1 ‖ 2010 | 0 }
-a+1/2, -b+1/2, c | -x, -y, -z	{ -1 ‖ 2001 | 1/2 1/2 0 }
a, b, c | -x, y, z	{ m ‖ 1 | 0 }
a+1/2, -b+1/2, -c | -x, y, z	{ m ‖ 2100 | 1/2 1/2 0 }
-a+1/2, b+1/2, -c | -x, y, z	{ m ‖ 2010 | 1/2 1/2 0 }
-a, -b, c | -x, y, z	{ m ‖ 2001 | 0 }
a+1/2, b+1/2, c | x, -y, -z	{ 2 ‖ 1 | 1/2 1/2 0 }
a, -b, -c | x, -y, -z	{ 2 ‖ 2100 | 0 }
-a, b, -c | x, -y, -z	{ 2 ‖ 2010 | 0 }
-a+1/2, -b+1/2, c | x, -y, -z	{ 2 ‖ 2001 | 1/2 1/2 0 }

Wyckoff Positions

WP	Site symmetry	Representative
2a	$\ce{^{-1}{2}}\ce{^{-1}{2}}\ce{^{1}{2}}\ce{^{\infty m}{1}} $	(0,0,0 | 0,0,0)
2b	$\ce{^{-1}{2}}\ce{^{-1}{2}}\ce{^{1}{2}}\ce{^{\infty m}{1}} $	(0,1/2,0 | 0,0,0)
2c	$\ce{^{-1}{2}}\ce{^{-1}{2}}\ce{^{1}{2}}\ce{^{\infty m}{1}} $	(1/2,0,1/2 | 0,0,0)
2d	$\ce{^{-1}{2}}\ce{^{-1}{2}}\ce{^{1}{2}}\ce{^{\infty m}{1}} $	(0,0,1/2 | 0,0,0)
4e	$\ce{^{-1}{2}}..\ce{^{\infty m}{1}} $	(a,0,0 | 0,0,0)
4f	$\ce{^{-1}{2}}..\ce{^{\infty m}{1}} $	(a,0,1/2 | 0,0,0)
4g	$.\ce{^{-1}{2}}.\ce{^{\infty m}{1}} $	(0,b,0 | 0,0,0)
4h	$.\ce{^{-1}{2}}.\ce{^{\infty m}{1}} $	(0,b,1/2 | 0,0,0)
4i	$..\ce{^{1}{2}}\ce{^{\infty m}{1}} $	(0,0,c | 0,0,z)
4j	$..\ce{^{1}{2}}\ce{^{\infty m}{1}} $	(0,1/2,c | 0,0,z)
4k	$..\ce{^{-1}{2}}\ce{^{\infty m}{1}} $	(1/4,1/4,c | 0,0,0)
8l	$\ce{^{1}{1}}\ce{^{\infty m}{1}} $	(a,b,c | 0,0,z)

Spin Brillouin Zone & k-little co-groups

Wavevector-k	Little co-group
Γ:(0,0,0)	$ \ce{^{1}{2}}\ce{^{1}{2}}\ce{^{1}{2}}\ce{^{\infty /mm}{1}} $
R:(1/2,1/2,1/2)	$ \ce{^{1}{2}}\ce{^{1}{2}}\ce{^{1}{2}}\ce{^{\infty /mm}{1}} $
S:(1/2,1/2,0)	$ \ce{^{1}{2}}\ce{^{1}{2}}\ce{^{1}{2}}\ce{^{\infty /mm}{1}} $
T:(0,1/2,1/2)	$ \ce{^{1}{2}}\ce{^{1}{2}}\ce{^{1}{2}}\ce{^{\infty /mm}{1}} $
U:(1/2,0,1/2)	$ \ce{^{1}{2}}\ce{^{1}{2}}\ce{^{1}{2}}\ce{^{\infty /mm}{1}} $
X:(1/2,0,0)	$ \ce{^{1}{2}}\ce{^{1}{2}}\ce{^{1}{2}}\ce{^{\infty /mm}{1}} $
Y:(0,1/2,0)	$ \ce{^{1}{2}}\ce{^{1}{2}}\ce{^{1}{2}}\ce{^{\infty /mm}{1}} $
Z:(0,0,1/2)	$ \ce{^{1}{2}}\ce{^{1}{2}}\ce{^{1}{2}}\ce{^{\infty /mm}{1}} $
A:(u,0,1/2)	$ \ce{^{1}{2}}\ce{^{m}{2}}\ce{^{m}{2}}\ce{^{\infty 2}{1}} $
B:(0,v,1/2)	$ \ce{^{m}{2}}\ce{^{1}{2}}\ce{^{m}{2}}\ce{^{\infty 2}{1}} $
C:(u,1/2,0)	$ \ce{^{1}{2}}\ce{^{m}{2}}\ce{^{m}{2}}\ce{^{\infty 2}{1}} $
D:(1/2,v,0)	$ \ce{^{m}{2}}\ce{^{1}{2}}\ce{^{m}{2}}\ce{^{\infty 2}{1}} $
Δ:(0,v,0)	$ \ce{^{m}{2}}\ce{^{1}{2}}\ce{^{m}{2}}\ce{^{\infty 2}{1}} $
E:(u,1/2,1/2)	$ \ce{^{1}{2}}\ce{^{m}{2}}\ce{^{m}{2}}\ce{^{\infty 2}{1}} $
G:(1/2,0,w)	$ \ce{^{m}{2}}\ce{^{m}{2}}\ce{^{1}{2}}\ce{^{\infty 2}{1}} $
H:(0,1/2,w)	$ \ce{^{m}{2}}\ce{^{m}{2}}\ce{^{1}{2}}\ce{^{\infty 2}{1}} $
Λ:(0,0,w)	$ \ce{^{m}{2}}\ce{^{m}{2}}\ce{^{1}{2}}\ce{^{\infty 2}{1}} $
P:(1/2,v,1/2)	$ \ce{^{m}{2}}\ce{^{1}{2}}\ce{^{m}{2}}\ce{^{\infty 2}{1}} $
Q:(1/2,1/2,w)	$ \ce{^{m}{2}}\ce{^{m}{2}}\ce{^{1}{2}}\ce{^{\infty 2}{1}} $
Σ:(u,0,0)	$ \ce{^{1}{2}}\ce{^{m}{2}}\ce{^{m}{2}}\ce{^{\infty 2}{1}} $
K:(0,v,w)	$ \ce{^{m}{2}}\ce{^{\infty 2}{1}} $
L:(1/2,v,w)	$ \ce{^{m}{2}}\ce{^{\infty 2}{1}} $
M:(u,0,w)	$ \ce{^{m}{2}}\ce{^{\infty 2}{1}} $
N:(u,1/2,w)	$ \ce{^{m}{2}}\ce{^{\infty 2}{1}} $
V:(u,v,0)	$ \ce{^{m}{2}}\ce{^{\infty 2}{1}} $
W:(u,v,1/2)	$ \ce{^{m}{2}}\ce{^{\infty 2}{1}} $
GP:(u,v,w)	$ \ce{^{1}{1}}\ce{^{\infty 2}{1}} $

Spin Brillouin Zone

Band Representations (Magnon)

4i

k-vector	A↑G(4)
Γ:(0,0,0)	$Γ_{1}^{S}(2)⊕Γ_{2}^{S}(2) $
R:(1/2,1/2,1/2)	$R_{1}^{S}R_{2}^{S}(4) $
S:(1/2,1/2,0)	$S_{1}^{S}S_{2}^{S}(4) $
T:(0,1/2,1/2)	$T_{1}^{S}(4) $
U:(1/2,0,1/2)	$U_{1}^{S}(4) $
X:(1/2,0,0)	$X_{1}^{S}(4) $
Y:(0,1/2,0)	$Y_{1}^{S}(4) $
Z:(0,0,1/2)	$Z_{1}^{S}(2)⊕Z_{2}^{S}(2) $
A:(u,0,1/2)	$A_{1}^{S}(2)⊕A_{2}^{S}(2) $
B:(0,v,1/2)	$B_{1}^{S}(2)⊕B_{2}^{S}(2) $
C:(u,1/2,0)	$C_{1}^{S}C_{2}^{S}(4) $
D:(1/2,v,0)	$D_{1}^{S}D_{2}^{S}(4) $
Δ:(0,v,0)	$Δ_{1}^{S}(2)⊕Δ_{2}^{S}(2) $
E:(u,1/2,1/2)	$E_{1}^{S}E_{2}^{S}(4) $
G:(1/2,0,w)	$G_{1}^{S}G_{2}^{S}(4) $
H:(0,1/2,w)	$H_{1}^{S}H_{2}^{S}(4) $
Λ:(0,0,w)	$2Λ_{1}^{S}(2) $
P:(1/2,v,1/2)	$P_{1}^{S}P_{2}^{S}(4) $
Q:(1/2,1/2,w)	$Q_{1}^{S}Q_{1}^{S}(4) $
Σ:(u,0,0)	$Σ_{1}^{S}(2)⊕Σ_{2}^{S}(2) $
K:(0,v,w)	$2K_{1}^{S}(2) $
L:(1/2,v,w)	$L_{1}^{S}L_{1}^{S}(4) $
M:(u,0,w)	$2M_{1}^{S}(2) $
N:(u,1/2,w)	$N_{1}^{S}N_{1}^{S}(4) $
V:(u,v,0)	$2V_{1}^{S}(2) $
W:(u,v,1/2)	$2W_{1}^{S}(2) $
GP:(u,v,w)	$2GP_{1}^{S}(2) $

4j

k-vector	A↑G(4)
Γ:(0,0,0)	$Γ_{1}^{S}(2)⊕Γ_{2}^{S}(2) $
R:(1/2,1/2,1/2)	$R_{3}^{S}R_{4}^{S}(4) $
S:(1/2,1/2,0)	$S_{3}^{S}S_{4}^{S}(4) $
T:(0,1/2,1/2)	$T_{1}^{S}(4) $
U:(1/2,0,1/2)	$U_{1}^{S}(4) $
X:(1/2,0,0)	$X_{1}^{S}(4) $
Y:(0,1/2,0)	$Y_{1}^{S}(4) $
Z:(0,0,1/2)	$Z_{1}^{S}(2)⊕Z_{2}^{S}(2) $
A:(u,0,1/2)	$A_{1}^{S}(2)⊕A_{2}^{S}(2) $
B:(0,v,1/2)	$B_{1}^{S}(2)⊕B_{2}^{S}(2) $
C:(u,1/2,0)	$C_{1}^{S}C_{2}^{S}(4) $
D:(1/2,v,0)	$D_{1}^{S}D_{2}^{S}(4) $
Δ:(0,v,0)	$Δ_{1}^{S}(2)⊕Δ_{2}^{S}(2) $
E:(u,1/2,1/2)	$E_{1}^{S}E_{2}^{S}(4) $
G:(1/2,0,w)	$G_{1}^{S}G_{2}^{S}(4) $
H:(0,1/2,w)	$H_{1}^{S}H_{2}^{S}(4) $
Λ:(0,0,w)	$2Λ_{1}^{S}(2) $
P:(1/2,v,1/2)	$P_{1}^{S}P_{2}^{S}(4) $
Q:(1/2,1/2,w)	$Q_{2}^{S}Q_{2}^{S}(4) $
Σ:(u,0,0)	$Σ_{1}^{S}(2)⊕Σ_{2}^{S}(2) $
K:(0,v,w)	$2K_{1}^{S}(2) $
L:(1/2,v,w)	$L_{1}^{S}L_{1}^{S}(4) $
M:(u,0,w)	$2M_{1}^{S}(2) $
N:(u,1/2,w)	$N_{1}^{S}N_{1}^{S}(4) $
V:(u,v,0)	$2V_{1}^{S}(2) $
W:(u,v,1/2)	$2W_{1}^{S}(2) $
GP:(u,v,w)	$2GP_{1}^{S}(2) $

8l

k-vector	A↑G(8)
Γ:(0,0,0)	$Γ_{1}^{S}(2)⊕Γ_{2}^{S}(2)⊕Γ_{3}^{S}(2)⊕Γ_{4}^{S}(2) $
R:(1/2,1/2,1/2)	$R_{1}^{S}R_{2}^{S}(4)⊕R_{3}^{S}R_{4}^{S}(4) $
S:(1/2,1/2,0)	$S_{1}^{S}S_{2}^{S}(4)⊕S_{3}^{S}S_{4}^{S}(4) $
T:(0,1/2,1/2)	$2T_{1}^{S}(4) $
U:(1/2,0,1/2)	$2U_{1}^{S}(4) $
X:(1/2,0,0)	$2X_{1}^{S}(4) $
Y:(0,1/2,0)	$2Y_{1}^{S}(4) $
Z:(0,0,1/2)	$Z_{1}^{S}(2)⊕Z_{2}^{S}(2)⊕Z_{3}^{S}(2)⊕Z_{4}^{S}(2) $
A:(u,0,1/2)	$2A_{1}^{S}(2)⊕2A_{2}^{S}(2) $
B:(0,v,1/2)	$2B_{1}^{S}(2)⊕2B_{2}^{S}(2) $
C:(u,1/2,0)	$2C_{1}^{S}C_{2}^{S}(4) $
D:(1/2,v,0)	$2D_{1}^{S}D_{2}^{S}(4) $
Δ:(0,v,0)	$2Δ_{1}^{S}(2)⊕2Δ_{2}^{S}(2) $
E:(u,1/2,1/2)	$2E_{1}^{S}E_{2}^{S}(4) $
G:(1/2,0,w)	$2G_{1}^{S}G_{2}^{S}(4) $
H:(0,1/2,w)	$2H_{1}^{S}H_{2}^{S}(4) $
Λ:(0,0,w)	$2Λ_{1}^{S}(2)⊕2Λ_{2}^{S}(2) $
P:(1/2,v,1/2)	$2P_{1}^{S}P_{2}^{S}(4) $
Q:(1/2,1/2,w)	$Q_{1}^{S}Q_{1}^{S}(4)⊕Q_{2}^{S}Q_{2}^{S}(4) $
Σ:(u,0,0)	$2Σ_{1}^{S}(2)⊕2Σ_{2}^{S}(2) $
K:(0,v,w)	$4K_{1}^{S}(2) $
L:(1/2,v,w)	$2L_{1}^{S}L_{1}^{S}(4) $
M:(u,0,w)	$4M_{1}^{S}(2) $
N:(u,1/2,w)	$2N_{1}^{S}N_{1}^{S}(4) $
V:(u,v,0)	$4V_{1}^{S}(2) $
W:(u,v,1/2)	$4W_{1}^{S}(2) $
GP:(u,v,w)	$4GP_{1}^{S}(2) $