From NWChem
group number = 8
group name = Cm
crystal system = Monoclinic
setting number = 1
number of symmetry operators = 4
+x,+y,+z
+x,-y,+z
+x+1/2,+y+1/2,+z
+x+1/2,-y+1/2,+z
= operator 1 =
1.0 0.0 0.0 0.0
0.0 1.0 0.0 0.0
0.0 0.0 1.0 0.0
= operator 2 =
1.0 0.0 0.0 0.0
0.0 -1.0 0.0 0.0
0.0 0.0 1.0 0.0
= operator 3 =
1.0 0.0 0.0 0.5
0.0 1.0 0.0 0.5
0.0 0.0 1.0 0.0
= operator 4 =
1.0 0.0 0.0 0.5
0.0 -1.0 0.0 0.5
0.0 0.0 1.0 0.0
group number = 8
group name = Cm
crystal system = Monoclinic
setting number = 2
number of symmetry operators = 4
+x,+y,+z
+x,+y,-z
+x,+y+1/2,+z+1/2
+x,+y+1/2,-z+1/2
= operator 1 =
1.0 0.0 0.0 0.0
0.0 1.0 0.0 0.0
0.0 0.0 1.0 0.0
= operator 2 =
1.0 0.0 0.0 0.0
0.0 1.0 0.0 0.0
0.0 0.0 -1.0 0.0
= operator 3 =
1.0 0.0 0.0 0.0
0.0 1.0 0.0 0.5
0.0 0.0 1.0 0.5
= operator 4 =
1.0 0.0 0.0 0.0
0.0 1.0 0.0 0.5
0.0 0.0 -1.0 0.5