data_[Rb2Cu4N2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Cu  1.9000  1.3500  0.8200
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [5.2135]
_cell_length_b [5.3397]
_cell_length_c [17.8661]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [RbCu2N]
_chemical_formula_sum '[Rb2 Cu4 N2]'
_cell_volume [497.3629]
_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
[
  Rb  Rb0  2  0.3782  0.5000  0.6192  1
  Cu  Cu1  4  0.4281  0.2434  0.4588  1
  N  N2  2  0.1717  0.0000  0.4631  1
]