data_[K4Er4Sn2O12]
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 [C2/m]
_cell_length_a [5.8338]
_cell_length_b [10.0508]
_cell_length_c [6.6475]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.2468]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Er2SnO6]
_chemical_formula_sum '[K4 Er4 Sn2 O12]'
_cell_volume [374.2085]
_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  4  0.0000  0.1651  0.0000  1.0
  Er  Er1  4  0.0000  0.3346  0.5000  1.0
  Sn  Sn2  2  0.0000  0.0000  0.5000  1.0
  O  O3  8  0.2115  0.1611  0.6732  1.0
  O  O4  4  0.2464  0.5000  0.6729  1.0
]