data_[Rb4Dy2Zn4Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Dy  1.2200  1.7500  1.1310
  Zn  1.6500  1.3500  0.8800
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.3270]
_cell_length_b [4.1157]
_cell_length_c [8.3762]
_cell_angle_alpha [90.0000]
_cell_angle_beta [112.4133]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Dy(ZnSe2)2]
_chemical_formula_sum '[Rb4 Dy2 Zn4 Se8]'
_cell_volume [520.3394]
_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  0.1291  0.0000  0.5599  1
  Dy  Dy1  2  0.0000  0.0000  0.0000  1
  Zn  Zn2  4  0.1846  0.5000  0.0077  1
  Se  Se3  4  0.0303  0.5000  0.7843  1
  Se  Se4  4  0.1895  0.0000  0.1957  1
]