data_[Rb3Nb1Ge2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Nb  1.6000  1.4500  0.8200
  Ge  2.0100  1.2500  0.7700
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P-3m1]
_cell_length_a [5.7383]
_cell_length_b [5.7383]
_cell_length_c [8.4600]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [164]
_chemical_formula_structural [Rb3Nb(GeO4)2]
_chemical_formula_sum '[Rb3 Nb1 Ge2 O8]'
_cell_volume [241.2527]
_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  2  0.3333  0.6667  0.7668  1
  Rb  Rb1  1  0.0000  0.0000  0.0000  1
  Nb  Nb2  1  0.0000  0.0000  0.5000  1
  Ge  Ge3  2  0.3333  0.6667  0.2878  1
  O  O4  6  0.1645  0.3290  0.3622  1
  O  O5  2  0.3333  0.6667  0.0856  1
]