data_In2SiSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.53
_cell_length_b   3.53
_cell_length_c   9.58
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   121.56
_symmetry_Int_Tables_number   1
_chemical_formula_structural   In2SiSe
_chemical_formula_sum   'In2 Si1 Se1'
_cell_volume   101.48
_cell_formula_units_Z   1
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  0.72  0.0  0.29  1.0
  In  In1  1  0.0  0.0  0.05  1.0
  Si  Si3  1  0.0  0.0  0.69  1.0
  Se  Se2  1  0.72  0.0  0.34  1.0

data_In2SiSe
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.53
_cell_length_b   6.01
_cell_length_c   9.58
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   In2SiSe
_chemical_formula_sum   'In4 Si2 Se2'
_cell_volume   203.03
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  0.0  0.0  0.95  1.0
  In  In1  2  0.28  0.0  0.71  1.0
  Si  Si2  2  0.0  0.0  0.31  1.0
  Se  Se3  2  0.28  0.0  0.66  1.0

In In Si Se