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Symmetry operations of the Double Space Group Pmm2 (No. 25)


N Shorthand
notation
Matrix presentation Seitz symbol
(0,0,0)+set
1x,y,z
s+,s-
(
   1   0   0      0
   0   1   0      0
   0   0   1      0
)
(
1 0
0 1
)
{1|0,0,0}
2-x,-y,z
-is+,is-
(
  -1   0   0      0
   0  -1   0      0
   0   0   1      0
)
(
-i 0
0 i
)
{2001|0,0,0}
3x,-y,z
-s-,s+
(
   1   0   0      0
   0  -1   0      0
   0   0   1      0
)
(
0 -1
1 0
)
{m010|0,0,0}
4-x,y,z
-is-,-is+
(
  -1   0   0      0
   0   1   0      0
   0   0   1      0
)
(
0 -i
-i 0
)
{m100|0,0,0}
5x,y,z
-s+,-s-
(
   1   0   0      0
   0   1   0      0
   0   0   1      0
)
(
-1 0
0 -1
)
{d1|0,0,0}
6-x,-y,z
is+,-is-
(
  -1   0   0      0
   0  -1   0      0
   0   0   1      0
)
(
i 0
0 -i
)
{d2001|0,0,0}
7x,-y,z
s-,-s+
(
   1   0   0      0
   0  -1   0      0
   0   0   1      0
)
(
0 1
-1 0
)
{dm010|0,0,0}
8-x,y,z
is-,is+
(
  -1   0   0      0
   0   1   0      0
   0   0   1      0
)
(
0 i
i 0
)
{dm100|0,0,0}


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