data_TlCu2Br
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.37
_cell_length_b   3.37
_cell_length_c   6.99
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TlCu2Br
_chemical_formula_sum   'Tl1 Cu2 Br1'
_cell_volume   79.54
_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
  Tl  Tl3  1  0.0  0.0  0.5  1.0
  Cu  Cu1  1  0.69  0.69  0.75  1.0
  Cu  Cu2  1  0.69  0.69  0.25  1.0
  Br  Br0  1  0.0  0.0  0.0  1.0

data_TlCu2Br
_symmetry_space_group_name_H-M   Amm2
_cell_length_a   6.99
_cell_length_b   4.77
_cell_length_c   4.77
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   38
_chemical_formula_structural   TlCu2Br
_chemical_formula_sum   'Tl2 Cu4 Br2'
_cell_volume   159.08
_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, y, z'
  4  'x, -y, z'
  5  'x, y+1/2, z+1/2'
  6  '-x, -y+1/2, z+1/2'
  7  '-x, y+1/2, z+1/2'
  8  'x, -y+1/2, z+1/2'
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
  Tl  Tl0  2  0.0  0.0  0.0  1.0
  Cu  Cu1  4  0.25  0.0  0.69  1.0
  Br  Br2  2  0.5  0.0  0.0  1.0

Tl Cu Cu Br
Tl Cu Cu Br 0 2 - - o 0 1 - - o 1 3 + + + 2 3 + + o 