data_[Rb2Be2N2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Be  1.5700  1.0500  0.5900
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Pma2]
_cell_length_a [2.8146]
_cell_length_b [11.2960]
_cell_length_c [17.9419]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [28]
_chemical_formula_structural [RbBeN]
_chemical_formula_sum '[Rb2 Be2 N2]'
_cell_volume [570.4342]
_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  0.2500  0.2713  0.4702  1
  Be  Be1  2  0.2500  0.9344  0.5969  1
  N  N2  2  0.2500  0.5316  0.4329  1
]