data_[Rb2Ca2Cu2Cl8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ca  1.0000  1.8000  1.1400
  Cu  1.9000  1.3500  0.8200
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.4921]
_cell_length_b [7.0020]
_cell_length_c [8.9833]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.9113]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbCaCuCl4]
_chemical_formula_sum '[Rb2 Ca2 Cu2 Cl8]'
_cell_volume [383.9493]
_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
[
  Rb  Rb0  2  0.2496  0.2500  0.0567  1.0
  Ca  Ca1  2  0.2211  0.2500  0.5525  1.0
  Cu  Cu2  2  0.2233  0.7500  0.3244  1.0
  Cl  Cl3  4  0.0229  0.5052  0.7052  1.0
  Cl  Cl4  2  0.4232  0.7500  0.1583  1.0
  Cl  Cl5  2  0.4641  0.7500  0.5814  1.0
]