 format  1  0
Bravais = basis  (2-d space group p3m1)
2       = dim
3       = # of symmetries

1 (I)
   1.0   0.0     0.0
   0.0   1.0     0.0

2 (3+ 0,0)
   0.0  -1.0     0.0
   1.0  -1.0     0.0 

3 (m x,-x)
   1.0   0.0     0.0
   1.0  -1.0     0.0  
