Ac1 Ca1 Hg2 
   1.0
     0.0000000000000000    3.9458749999999996    3.9458749999999996
     3.9458749999999996    0.0000000000000000    3.9458749999999996
     3.9458749999999996    3.9458749999999996    0.0000000000000000
   Ac Ca Hg 
   1 1 2 
Direct
  0.000000000000 0.000000000000 0.000000000000 
  0.500000000000 0.500000000000 0.500000000000 
  0.750000000000 0.750000000000 0.750000000000 
  0.250000000000 0.250000000000 0.250000000000 
