data_[K2Er2Sn2O6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Er  1.2400  1.7500  1.0300
  Sn  1.9600  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.0454]
_cell_length_b [3.4200]
_cell_length_c [10.1040]
_cell_angle_alpha [90.0000]
_cell_angle_beta [92.2531]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [KErSnO3]
_chemical_formula_sum '[K2 Er2 Sn2 O6]'
_cell_volume [243.2681]
_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
[
  K  K0  2  0.3434  0.2500  0.2983  1.0
  Er  Er1  2  0.1104  0.2500  0.6231  1.0
  Sn  Sn2  2  0.2482  0.7500  0.8979  1.0
  O  O3  2  0.0271  0.7500  0.7575  1.0
  O  O4  2  0.1736  0.7500  0.4864  1.0
  O  O5  2  0.3602  0.2500  0.7850  1.0
]