data_[K2Y1Fe1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Y  1.2200  1.8000  1.0400
  Fe  1.8300  1.4000  0.8525
]
_symmetry_space_group_name_H-M [P4mm]
_cell_length_a [3.7816]
_cell_length_b [3.7816]
_cell_length_c [10.9276]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [99]
_chemical_formula_structural [K2YFe]
_chemical_formula_sum '[K2 Y1 Fe1]'
_cell_volume [156.2667]
_cell_formula_units_Z [1]
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  1  0.0000  0.0000  0.9253  1
  K  K1  1  0.5000  0.5000  0.2975  1
  Y  Y2  1  0.0000  0.0000  0.5947  1
  Fe  Fe3  1  0.5000  0.5000  0.6825  1
]