data_[Rb4Pu2Cu4Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Pu  1.2800  1.7500  0.9675
  Cu  1.9000  1.3500  0.8200
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.1195]
_cell_length_b [4.1527]
_cell_length_c [8.1453]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.8357]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Pu(CuSe2)2]
_chemical_formula_sum '[Rb4 Pu2 Cu4 Se8]'
_cell_volume [484.0278]
_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  0.1357  0.0000  0.5629  1
  Pu  Pu1  2  0.0000  0.0000  0.0000  1
  Cu  Cu2  4  0.1804  0.5000  0.9859  1
  Se  Se3  4  0.0215  0.5000  0.7733  1
  Se  Se4  4  0.1983  0.0000  0.1668  1
]