data_[Ca2Cu2Br6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Cu  1.9000  1.3500  0.8200
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [19.0690]
_cell_length_b [4.8838]
_cell_length_c [13.8995]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [CaCuBr3]
_chemical_formula_sum '[Ca2 Cu2 Br6]'
_cell_volume [1294.4570]
_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
[
  Ca  Ca0  2  0.5000  0.0000  0.8700  1
  Cu  Cu1  2  0.5000  0.0000  0.0866  1
  Br  Br2  4  0.3933  0.0000  0.0023  1
  Br  Br3  2  0.5000  0.0000  0.2615  1
]