data_[K2Ca2Ru4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ca  1.0000  1.8000  1.1400
  Ru  2.2000  1.3000  0.6610
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [5.2522]
_cell_length_b [9.8985]
_cell_length_c [3.0815]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [KCaRu2]
_chemical_formula_sum '[K2 Ca2 Ru4]'
_cell_volume [160.2020]
_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  0.5000  0.5000  1
  Ca  Ca1  2  0.0000  0.0000  0.5000  1
  Ru  Ru2  4  0.2500  0.2500  0.0000  1
]