data_BiTeBr2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.89
_cell_length_b   5.89
_cell_length_c   5.89
_cell_angle_alpha   131.76
_cell_angle_beta   131.76
_cell_angle_gamma   70.61
_symmetry_Int_Tables_number   1
_chemical_formula_structural   BiTeBr2
_chemical_formula_sum   'Bi1 Te1 Br2'
_cell_volume   111.58
_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
  Bi  Bi0  1  0.0  0.0  0.81  1.0
  Te  Te3  1  0.0  0.0  0.0  1.0
  Br  Br1  1  0.0  0.41  0.4  1.0
  Br  Br2  1  0.41  0.0  0.4  1.0

data_BiTeBr2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.81
_cell_length_b   6.81
_cell_length_c   5.89
_cell_angle_alpha   90.0
_cell_angle_beta   125.3
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   BiTeBr2
_chemical_formula_sum   'Bi2 Te2 Br4'
_cell_volume   223.17
_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
  Bi  Bi0  2  0.19  0.0  0.19  1.0
  Te  Te1  2  0.0  0.0  0.0  1.0
  Br  Br2  4  0.3  0.3  0.0  1.0

Bi Te Br Br
Bi Te Br Br 0 1 o o + 1 2 o o o 1 3 o o o 