Ac2 Na1 Sn1 
   1.0
     0.0000000000000000    4.1205210000000001    4.1205210000000001
     4.1205210000000001    0.0000000000000000    4.1205210000000001
     4.1205210000000001    4.1205210000000001    0.0000000000000000
   Ac Na Sn 
   2 1 1 
Direct
  0.750000000000 0.750000000000 0.750000000000 
  0.250000000000 0.250000000000 0.250000000000 
  0.000000000000 0.000000000000 0.000000000000 
  0.500000000000 0.500000000000 0.500000000000 
