data_InSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.18
_cell_length_b   3.18
_cell_length_c   11.13
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   102.54
_symmetry_Int_Tables_number   1
_chemical_formula_structural   InSe
_chemical_formula_sum   'In2 Se2'
_cell_volume   109.64
_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
  In  In0  1  0.99  0.24  0.65  1.0
  In  In1  1  0.99  0.76  0.47  1.0
  Se  Se2  1  0.99  0.24  0.29  1.0
  Se  Se3  1  0.99  0.76  0.83  1.0

data_InSe
_symmetry_space_group_name_H-M   P-1
_cell_length_a   3.18
_cell_length_b   3.18
_cell_length_c   11.13
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   102.54
_symmetry_Int_Tables_number   2
_chemical_formula_structural   InSe
_chemical_formula_sum   'In2 Se2'
_cell_volume   109.64
_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
  In  In0  2  0.5  0.24  0.59  1.0
  Se  Se1  2  0.5  0.24  0.23  1.0

In In Se Se