data_[Ca4Ru4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Ru  2.2000  1.3000  0.6610
]
_symmetry_space_group_name_H-M [Cmme]
_cell_length_a [4.4673]
_cell_length_b [4.8906]
_cell_length_c [8.6793]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [67]
_chemical_formula_structural [CaRu]
_chemical_formula_sum '[Ca4 Ru4]'
_cell_volume [189.6237]
_cell_formula_units_Z [4]
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
[
  Ca  Ca0  4  0.0000  0.2500  0.7996  1
  Ru  Ru1  4  0.0000  0.2500  0.4385  1
]