data_[K2Rb1Ru1C1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Rb  0.8200  2.3500  1.6600
  Ru  2.2000  1.3000  0.6610
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [6.0906]
_cell_length_b [6.0906]
_cell_length_c [3.9482]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [K2RbRuC]
_chemical_formula_sum '[K2 Rb1 Ru1 C1]'
_cell_volume [146.4597]
_cell_formula_units_Z [1]
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  0.0000  1
  Rb  Rb1  1  0.5000  0.5000  0.5000  1
  Ru  Ru2  1  0.0000  0.0000  0.5000  1
  C  C3  1  0.0000  0.0000  0.0000  1
]