Ac2 Hg1 Si1 
   1.0
     0.0000000000000000    3.9530940000000001    3.9530940000000001
     3.9530940000000001    0.0000000000000000    3.9530940000000001
     3.9530940000000001    3.9530940000000001    0.0000000000000000
   Ac Hg Si 
   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 
