data_Se3N2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.45
_cell_length_b   7.45
_cell_length_c   7.45
_cell_angle_alpha   44.11
_cell_angle_beta   44.11
_cell_angle_gamma   44.11
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Se3N2
_chemical_formula_sum   'Se6 N4'
_cell_volume   182.01
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Se  Se4  1  0.83  0.8  0.39  1.0
  Se  Se5  1  0.03  0.82  0.39  1.0
  Se  Se6  1  0.14  0.38  0.39  1.0
  Se  Se7  1  0.86  0.62  0.75  1.0
  Se  Se8  1  0.97  0.18  0.75  1.0
  Se  Se9  1  0.17  0.2  0.75  1.0
  N  N0  1  0.0  0.0  0.34  1.0
  N  N1  1  0.0  0.0  0.73  1.0
  N  N2  1  0.0  0.0  0.41  1.0
  N  N3  1  0.0  0.0  0.8  1.0

data_Se3N2
_symmetry_space_group_name_H-M   P-1
_cell_length_a   5.6
_cell_length_b   5.6
_cell_length_c   7.45
_cell_angle_alpha   67.94
_cell_angle_beta   67.94
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   Se3N2
_chemical_formula_sum   'Se6 N4'
_cell_volume   182.01
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-x, -y, -z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Se  Se0  2  0.18  0.18  0.17  1.0
  Se  Se1  2  0.2  0.18  0.95  1.0
  Se  Se2  2  0.38  0.82  0.15  1.0
  N  N3  2  0.0  0.16  0.34  1.0
  N  N4  2  0.0  0.23  0.27  1.0

Se Se Se Se Se Se N N N N