data_[Rb1Y2Be1Sb1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Y  1.2200  1.8000  1.0400
  Be  1.5700  1.0500  0.5900
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [5.3879]
_cell_length_b [5.3879]
_cell_length_c [5.3134]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [RbY2BeSb]
_chemical_formula_sum '[Rb1 Y2 Be1 Sb1]'
_cell_volume [154.2468]
_cell_formula_units_Z [1]
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  1  0.0000  0.0000  0.5000  1
  Y  Y1  2  0.0000  0.5000  0.0000  1
  Be  Be2  1  0.0000  0.0000  0.0000  1
  Sb  Sb3  1  0.5000  0.5000  0.5000  1
]