data_[Rb3Ca1U2O9]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ca  1.0000  1.8000  1.1400
  U  1.3800  1.7500  0.9913
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P-3m1]
_cell_length_a [6.2182]
_cell_length_b [6.2182]
_cell_length_c [7.5859]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [164]
_chemical_formula_structural [Rb3CaU2O9]
_chemical_formula_sum '[Rb3 Ca1 U2 O9]'
_cell_volume [254.0162]
_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  0.6591  1
  Rb  Rb1  1  0.0000  0.0000  0.0000  1
  Ca  Ca2  1  0.0000  0.0000  0.5000  1
  U  U3  2  0.3333  0.6667  0.1647  1
  O  O4  6  0.1795  0.8205  0.3159  1
  O  O5  3  0.0000  0.5000  0.0000  1
]