data_RbY2O4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.12
_cell_length_b   7.12
_cell_length_c   7.12
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbY2O4
_chemical_formula_sum   'Rb2 Y4 O8'
_cell_volume   255.31
_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  Rb8  1  0.0  0.0  0.0  1.0
  Rb  Rb9  1  0.52  0.52  0.52  1.0
  Y  Y10  1  0.78  0.78  0.29  1.0
  Y  Y11  1  0.29  0.78  0.78  1.0
  Y  Y12  1  0.29  0.29  0.29  1.0
  Y  Y13  1  0.78  0.29  0.78  1.0
  O  O0  1  0.02  0.02  0.02  1.0
  O  O1  1  0.02  0.05  0.05  1.0
  O  O2  1  0.05  0.02  0.05  1.0
  O  O3  1  0.54  0.54  0.56  1.0
  O  O4  1  0.05  0.05  0.02  1.0
  O  O5  1  0.54  0.56  0.54  1.0
  O  O6  1  0.56  0.56  0.56  1.0
  O  O7  1  0.56  0.54  0.54  1.0

data_RbY2O4
_symmetry_space_group_name_H-M   R3m
_cell_length_a   7.12
_cell_length_b   7.12
_cell_length_c   17.44
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   RbY2O4
_chemical_formula_sum   'Rb6 Y12 O24'
_cell_volume   765.93
_cell_formula_units_Z   6
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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  3  0.0  0.0  0.0  1.0
  Rb  Rb1  3  0.0  0.0  0.48  1.0
  Y  Y2  9  0.17  0.35  0.05  1.0
  Y  Y3  3  0.0  0.0  0.71  1.0
  O  O4  9  0.01  0.01  0.45  1.0
  O  O5  9  0.01  0.01  0.96  1.0
  O  O6  3  0.0  0.0  0.44  1.0
  O  O7  3  0.0  0.0  0.98  1.0

Rb Rb Y Y Y Y O O O O O O O O
RbY2O4 crystallizes in the trigonal R3m space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a single-bond geometry to three equivalent Y(1) and one O(1) atom. All Rb(1)-Y(1) bond lengths are 2.31 Å. The Rb(1)-O(1) bond length is 0.42 Å. In the second Rb site, Rb(2) is bonded in a 3-coordinate geometry to one Y(2) and three equivalent O(3) atoms. The Rb(2)-Y(2) bond length is 3.90 Å. All Rb(2)-O(3) bond lengths are 0.56 Å. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a distorted linear geometry to one Rb(1), two equivalent Y(2), and one O(4) atom. Both Y(1)-Y(2) bond lengths are 3.57 Å. The Y(1)-O(4) bond length is 2.18 Å. In the second Y site, Y(2) is bonded to one Rb(2) and six equivalent Y(1) atoms to form distorted corner-sharing YRbY6 hexagonal pyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Rb(1) and three equivalent O(2) atoms. All O(1)-O(2) bond lengths are 0.27 Å. In the second O site, O(2) is bonded in a 3-coordinate geometry to one O(1) and two equivalent O(2) atoms. Both O(2)-O(2) bond lengths are 0.15 Å. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Rb(2), one O(4), and two equivalent O(3) atoms. The O(3)-O(4) bond length is 0.27 Å. Both O(3)-O(3) bond lengths are 0.15 Å. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to three equivalent Y(1) and three equivalent O(3) atoms.