data_[Rb4Cu4H2Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Cu  1.9000  1.3500  0.8200
  H  2.2000  0.2500  0.0000
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [11.6675]
_cell_length_b [4.2525]
_cell_length_c [8.0688]
_cell_angle_alpha [90.0000]
_cell_angle_beta [124.9293]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Cu2HSe2]
_chemical_formula_sum '[Rb4 Cu4 H2 Se4]'
_cell_volume [328.2237]
_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  4  0.0555  0.5000  0.3249  1
  Cu  Cu1  4  0.1695  0.0000  0.0657  1
  H  H2  2  0.0000  0.0000  0.0000  1
  Se  Se3  4  0.2102  0.0000  0.7834  1
]