data_[K2Hf4Mg4O14]
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
  Mg  1.3100  1.5000  0.8600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [4.1486]
_cell_length_b [4.1486]
_cell_length_c [17.9565]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [KHf2Mg2O7]
_chemical_formula_sum '[K2 Hf4 Mg4 O14]'
_cell_volume [309.0486]
_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
  Hf  Hf1  4  0.0000  0.0000  0.3864  1.0
  Mg  Mg2  4  0.0000  0.5000  0.2500  1.0
  O  O3  8  0.0000  0.5000  0.1261  1.0
  O  O4  4  0.0000  0.0000  0.2659  1.0
  O  O5  2  0.0000  0.0000  0.5000  1.0
]