data_[K2Er2Ag2O4]
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
  Ag  1.9300  1.6000  1.0867
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2/c]
_cell_length_a [6.6939]
_cell_length_b [5.5907]
_cell_length_c [6.4129]
_cell_angle_alpha [90.0000]
_cell_angle_beta [94.7572]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [13]
_chemical_formula_structural [KErAgO2]
_chemical_formula_sum '[K2 Er2 Ag2 O4]'
_cell_volume [239.1675]
_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  0.5000  0.3173  0.7500  1
  Er  Er1  2  0.0000  0.4819  0.2500  1
  Ag  Ag2  2  0.0000  0.0000  0.0000  1
  O  O3  4  0.1992  0.3877  0.0090  1
]