data_[K2Hf2Ni2Se6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Hf  1.3000  1.5500  0.8500
  Ni  1.9100  1.3500  0.7400
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [8.9006]
_cell_length_b [3.8104]
_cell_length_c [9.5709]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.3638]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [KHfNiSe3]
_chemical_formula_sum '[K2 Hf2 Ni2 Se6]'
_cell_volume [297.9814]
_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  0.2228  0.2500  0.2480  1.0
  Hf  Hf1  2  0.3071  0.7500  0.8326  1.0
  Ni  Ni2  2  0.0884  0.2500  0.5955  1.0
  Se  Se3  2  0.1119  0.2500  0.8583  1.0
  Se  Se4  2  0.2089  0.7500  0.5327  1.0
  Se  Se5  2  0.4668  0.7500  0.1492  1.0
]