data_[Si4Ru4N4O4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  Ru  2.2000  1.3000  0.6610
  N  3.0400  0.6500  0.6300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pca2_1]
_cell_length_a [4.9581]
_cell_length_b [7.4410]
_cell_length_c [5.2598]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [29]
_chemical_formula_structural [SiRuNO]
_chemical_formula_sum '[Si4 Ru4 N4 O4]'
_cell_volume [194.0500]
_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
[
  Si  Si0  4  0.2340  0.7138  0.9937  1
  Ru  Ru1  4  0.0855  0.0587  0.9086  1
  N  N2  4  0.0755  0.1734  0.5594  1
  O  O3  4  0.1974  0.5862  0.7406  1
]