From NWChem
group number = 168
group name = P6
crystal system = Hexagonal
setting number = 1
number of symmetry operators = 6
+x,+y,+z
-y,+x-y,+z
-x+y,-x,+z
-x,-y,+z
+y,-x+y,+z
+x-y,+x,+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 =
0.0 -1.0 0.0 0.0
1.0 -1.0 0.0 0.0
0.0 0.0 1.0 0.0
= operator 3 =
-1.0 1.0 0.0 0.0
-1.0 0.0 0.0 0.0
0.0 0.0 1.0 0.0
= operator 4 =
-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 5 =
0.0 1.0 0.0 0.0
-1.0 1.0 0.0 0.0
0.0 0.0 1.0 0.0
= operator 6 =
1.0 -1.0 0.0 0.0
1.0 0.0 0.0 0.0
0.0 0.0 1.0 0.0