data_[K8Sr4Sn4Se16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Sr  0.9500  2.0000  1.3200
  Sn  1.9600  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Imma]
_cell_length_a [8.5950]
_cell_length_b [9.1606]
_cell_length_c [12.5564]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [74]
_chemical_formula_structural [K2SrSnSe4]
_chemical_formula_sum '[K8 Sr4 Sn4 Se16]'
_cell_volume [988.6340]
_cell_formula_units_Z [4]
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  0.0000  0.0000  1
  K  K1  4  0.2500  0.2500  0.7500  1
  Sr  Sr2  4  0.0000  0.0000  0.5000  1
  Sn  Sn3  4  0.2500  0.2500  0.2500  1
  Se  Se4  8  0.0000  0.0398  0.2528  1
  Se  Se5  8  0.2419  0.2500  0.4670  1
]