data_[K8Ru8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ru  2.2000  1.3000  0.6610
]
_symmetry_space_group_name_H-M [I4/m]
_cell_length_a [14.2150]
_cell_length_b [14.2150]
_cell_length_c [2.8537]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [87]
_chemical_formula_structural [KRu]
_chemical_formula_sum '[K8 Ru8]'
_cell_volume [576.6259]
_cell_formula_units_Z [8]
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  8  0.0410  0.7471  0.5000  1
  Ru  Ru1  8  0.1822  0.2542  0.5000  1
]