Ac2 Si6 
   1.0
     6.5248635085569600    0.0000000000000000    0.0000000000000000
    -3.2624317542784800    5.6506975546363902    0.0000000000000000
     0.0000000000000000    0.0000000000000000    4.6379149999999996
   Ac Si 
   2 6 
Direct
  0.333333333333 0.666666666667 0.250000000000 
  0.666666666667 0.333333333333 0.750000000000 
  0.128079000000 0.256157999999 0.750000000000 
  0.128079000000 0.871921000000 0.750000000000 
  0.256157999999 0.128079000000 0.250000000000 
  0.743842000001 0.871921000000 0.750000000000 
  0.871921000000 0.128079000000 0.250000000000 
  0.871921000000 0.743842000001 0.250000000000 
