# type topo
# cell     1.732100     1.732100     1.000000    90.000000    90.000000   120.000000
3
  1 v      0.000000    0.000000    0.000000   0                              3/4       3/1      3/13      2/10      2/13       2/1      1/14      1/12 
  2 n     -0.000087    1.000078    0.000000   1                             1/16      1/13      1/25 
  3 n      0.866137    0.499964    0.000000   1                             1/22      1/25      1/13