 O Sn
   1.0
     3.8089601000000002    0.0000000000000000    0.0000000000000000
     0.0000000000000000    3.8089601000000002    0.0000000000000000
     0.0000000000000000   -0.0000000000000000    4.7486812399999998
 O Sn
   2   2
Direct
   0.5000000000000000  0.5000000000000000  0.0000000000000000
   0.0000000000000000  0.0000000000000000  0.0000000000000000
   0.0000000000000000  0.5000000000000000  0.2431295500000000
   0.5000000000000000  0.0000000000000000  0.7568704500000000