data_[Na4Er4Pt2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Er  1.2400  1.7500  1.0300
  Pt  2.2800  1.3500  0.8050
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [5.6826]
_cell_length_b [9.9002]
_cell_length_c [5.8752]
_cell_angle_alpha [90.0000]
_cell_angle_beta [104.7744]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Er2PtO6]
_chemical_formula_sum '[Na4 Er4 Pt2 O12]'
_cell_volume [319.6010]
_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
[
  Na  Na0  4  0.0000  0.1468  0.0000  1.0
  Er  Er1  4  0.0000  0.3370  0.5000  1.0
  Pt  Pt2  2  0.0000  0.0000  0.5000  1.0
  O  O3  8  0.2023  0.1597  0.6942  1.0
  O  O4  4  0.2485  0.5000  0.7032  1.0
]