data_[Rb12Si4Ge4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Si  1.9000  1.1000  0.5400
  Ge  2.0100  1.2500  0.7700
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.0885]
_cell_length_b [11.7177]
_cell_length_c [8.7477]
_cell_angle_alpha [90.0000]
_cell_angle_beta [128.7997]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb3SiGe]
_chemical_formula_sum '[Rb12 Si4 Ge4]'
_cell_volume [965.6939]
_cell_formula_units_Z [4]
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  8  0.2381  0.2002  0.2334  1
  Rb  Rb1  4  0.0401  0.5000  0.2475  1
  Si  Si2  4  0.0853  0.0000  0.4593  1
  Ge  Ge3  4  0.1681  0.0000  0.7973  1
]