data_[K4Ag4Sn2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ag  1.9300  1.6000  1.0867
  Sn  1.9600  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2/c]
_cell_length_a [7.6913]
_cell_length_b [6.0173]
_cell_length_c [12.4779]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.8325]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [13]
_chemical_formula_structural [K2Ag2SnSe4]
_chemical_formula_sum '[K4 Ag4 Sn2 Se8]'
_cell_volume [528.2487]
_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  0.0000  0.0000  0.0000  1.0
  K  K1  2  0.0000  0.4784  0.7500  1.0
  Ag  Ag2  4  0.4991  0.2500  0.5319  1.0
  Sn  Sn3  2  0.5000  0.2492  0.2500  1.0
  Se  Se4  4  0.2667  0.4702  0.0736  1.0
  Se  Se5  4  0.2668  0.0309  0.3114  1.0
]