# type topo
# cell     3.999800     3.999800     2.449800    90.000000    90.000000   120.000000
12
  1 n      0.000000    0.000000    0.000000   0                             4/13       5/1      6/13 
  2 n      1.999900    1.154643    0.816600   0                             7/13      8/13      9/13 
  3 n     -0.000000    2.309286    1.633200   0                            10/13     11/13     12/13 
  4 n     -0.499975    0.865982    0.000000   1                             1/13       9/4     11/12 
  5 n      1.499925    2.597946    0.000000   1                             1/25      7/13     12/12 
  6 n      0.999950    0.000000    0.000000   1                             1/13      8/13      10/9 
  7 n      1.499925    2.020625    0.816600   1                             2/13      5/13     12/13 
  8 n      1.499925    0.288661    0.816600   1                             2/13      6/13     10/10 
  9 n      2.999850    1.154643    0.816600   1                             2/13      4/22     11/22 
 10 n     -0.499975    3.175268    1.633200   1                             3/13      6/17      8/16 
 11 n     -0.499975    1.443304    1.633200   1                             3/13      4/14       9/4 
 12 n      0.999950    2.309286    1.633200   1                             3/13      5/14      7/13