data_[Rb4Al2Ge4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Al  1.6100  1.2500  0.6750
  Ge  2.0100  1.2500  0.7700
]
_symmetry_space_group_name_H-M [P4/mbm]
_cell_length_a [6.9748]
_cell_length_b [6.9748]
_cell_length_c [6.0131]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [127]
_chemical_formula_structural [Rb2AlGe2]
_chemical_formula_sum '[Rb4 Al2 Ge4]'
_cell_volume [292.5214]
_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  4  0.1792  0.6792  0.5000  1
  Al  Al1  2  0.0000  0.0000  0.0000  1
  Ge  Ge2  4  0.1295  0.3705  0.0000  1
]