data_RbY3O
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.45
_cell_length_b   5.45
_cell_length_c   5.45
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   RbY3O
_chemical_formula_sum   'Rb1 Y3 O1'
_cell_volume   161.8
_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  Rb4  1  0.72  0.72  0.72  1.0
  Y  Y0  1  0.72  0.0  0.72  1.0
  Y  Y1  1  0.72  0.72  0.0  1.0
  Y  Y2  1  0.0  0.72  0.72  1.0
  O  O3  1  0.0  0.0  0.0  1.0

data_RbY3O
_symmetry_space_group_name_H-M   R3m
_cell_length_a   7.71
_cell_length_b   7.71
_cell_length_c   9.44
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   RbY3O
_chemical_formula_sum   'Rb3 Y9 O3'
_cell_volume   485.4
_cell_formula_units_Z   3
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  0.72  1.0
  Y  Y1  9  0.18  0.09  0.82  1.0
  O  O2  3  0.0  0.0  0.0  1.0

Rb Y Y Y O
Rb Y Y Y O 0 1 o + o 0 2 o o + 0 3 + o o 1 4 + o + 2 4 + + o 3 4 o + + 
RbY3O is alpha Po structured and crystallizes in the trigonal R3m space group. The structure is zero-dimensional and consists of three RbY3O clusters. Rb(1) is bonded in a distorted T-shaped geometry to three equivalent Y(1) atoms. All Rb(1)-Y(1) bond lengths are 1.50 Å. Y(1) is bonded in an L-shaped geometry to one Rb(1) and one O(1) atom. The Y(1)-O(1) bond length is 2.12 Å. O(1) is bonded in a 3-coordinate geometry to three equivalent Y(1) atoms.