data_RbPrNb2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   11.91
_cell_length_b   11.91
_cell_length_c   11.91
_cell_angle_alpha   153.07
_cell_angle_beta   38.54
_cell_angle_gamma   152.94
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbPrNb2O7
_chemical_formula_sum   'Rb2 Pr2 Nb4 O14'
_cell_volume   347.49
_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  1  0.0  0.24  0.0  1.0
  Rb  Rb1  1  0.0  0.0  0.0  1.0
  Pr  Pr2  1  0.0  0.86  0.12  1.0
  Pr  Pr3  1  0.77  0.38  0.67  1.0
  Nb  Nb4  1  0.0  0.31  0.77  1.0
  Nb  Nb5  1  0.77  0.93  0.01  1.0
  Nb  Nb6  1  0.77  0.31  0.01  1.0
  Nb  Nb7  1  0.0  0.93  0.77  1.0
  O  O8  1  0.0  0.62  0.93  1.0
  O  O9  1  0.77  0.62  0.86  1.0
  O  O10  1  0.0  0.51  0.81  1.0
  O  O11  1  0.77  0.74  0.98  1.0
  O  O12  1  0.77  0.51  0.98  1.0
  O  O13  1  0.0  0.74  0.81  1.0
  O  O14  1  0.39  0.79  0.39  1.0
  O  O15  1  0.61  0.46  0.39  1.0
  O  O16  1  0.39  0.03  0.61  1.0
  O  O17  1  0.39  0.46  0.39  1.0
  O  O18  1  0.39  0.98  0.39  1.0
  O  O19  1  0.39  0.51  0.61  1.0
  O  O20  1  0.61  0.98  0.39  1.0
  O  O21  1  0.39  0.27  0.39  1.0

data_RbPrNb2O7
_symmetry_space_group_name_H-M   P1
_cell_length_a   5.55
_cell_length_b   5.57
_cell_length_c   11.91
_cell_angle_alpha   103.53
_cell_angle_beta   103.46
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbPrNb2O7
_chemical_formula_sum   'Rb2 Pr2 Nb4 O14'
_cell_volume   347.49
_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  1  -0.0  0.76  0.76  1.0
  Rb  Rb1  1  0.0  0.0  0.0  1.0
  Pr  Pr2  1  0.12  0.25  0.25  1.0
  Pr  Pr3  1  0.67  0.29  0.06  1.0
  Nb  Nb4  1  0.01  0.7  0.47  1.0
  Nb  Nb5  1  0.01  0.08  0.85  1.0
  Nb  Nb6  1  0.77  0.46  0.46  1.0
  Nb  Nb7  1  0.77  0.84  0.84  1.0
  O  O8  1  0.39  0.94  0.32  1.0
  O  O9  1  0.39  0.94  0.55  1.0
  O  O10  1  0.39  0.13  0.51  1.0
  O  O11  1  0.39  0.42  0.03  1.0
  O  O12  1  0.39  0.42  0.8  1.0
  O  O13  1  0.39  0.61  0.99  1.0
  O  O14  1  0.61  0.1  0.48  1.0
  O  O15  1  0.61  0.58  0.96  1.0
  O  O16  1  0.81  0.07  0.07  1.0
  O  O17  1  0.81  0.3  0.3  1.0
  O  O18  1  0.86  0.23  0.01  1.0
  O  O19  1  0.93  0.31  0.31  1.0
  O  O20  1  0.98  0.24  0.02  1.0
  O  O21  1  0.98  0.47  0.25  1.0

Rb Rb Pr Pr Nb Nb Nb Nb O O O O O O O O O O O O O O