format 1 0
Bravais = basis  (group cm)
2       = dim
3       = # symmetries

1 (I)
  1.0   0.0     0.0
  0.0   1.0     0.0

2 (m 0 y)
 -1.0   0.0     0.0 
  0.0   1.0     0.0 

3 (5 0.5 0.5)
  1.0   0.0     0.5 
  0.0   1.0     0.5 
