data_[Na2Be2Ru2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Be  1.5700  1.0500  0.5900
  Ru  2.2000  1.3000  0.6610
]
_symmetry_space_group_name_H-M [P4/nmm]
_cell_length_a [3.0201]
_cell_length_b [3.0201]
_cell_length_c [10.9302]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [129]
_chemical_formula_structural [NaBeRu]
_chemical_formula_sum '[Na2 Be2 Ru2]'
_cell_volume [99.6926]
_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
[
  Na  Na0  2  0.0000  0.5000  0.3574  1
  Be  Be1  2  0.0000  0.5000  0.8465  1
  Ru  Ru2  2  0.0000  0.5000  0.0812  1
]