data_[Rb4Zr2Ag4Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Zr  1.3300  1.5500  0.8600
  Ag  1.9300  1.6000  1.0867
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.5326]
_cell_length_b [4.1644]
_cell_length_c [8.2117]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.6109]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Zr(AgSe2)2]
_chemical_formula_sum '[Rb4 Zr2 Ag4 Se8]'
_cell_volume [500.3542]
_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  0.1361  0.0000  0.5737  1.0
  Zr  Zr1  2  0.0000  0.0000  0.0000  1.0
  Ag  Ag2  4  0.1808  0.5000  0.9783  1.0
  Se  Se3  4  0.0074  0.5000  0.7755  1.0
  Se  Se4  4  0.1851  0.0000  0.1893  1.0
]