data_[K2Rb2Zn2Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Rb  0.8200  2.3500  1.6600
  Zn  1.6500  1.3500  0.8800
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Pmma]
_cell_length_a [5.6676]
_cell_length_b [8.1081]
_cell_length_c [7.0618]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [51]
_chemical_formula_structural [KRbZnSe2]
_chemical_formula_sum '[K2 Rb2 Zn2 Se4]'
_cell_volume [324.5119]
_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  0.2500  0.0000  0.4089  1
  Rb  Rb1  2  0.2500  0.5000  0.1978  1
  Zn  Zn2  2  0.0000  0.0000  0.0000  1
  Se  Se3  4  0.2500  0.2179  0.8125  1
]