data_Rb8AsO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.16
_cell_length_b   7.16
_cell_length_c   7.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Rb8AsO3
_chemical_formula_sum   'Rb8 As1 O3'
_cell_volume   367.55
_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  0.9  0.9  0.9  1.0
  Rb  Rb5  1  0.27  0.9  0.9  1.0
  Rb  Rb6  1  0.9  0.27  0.9  1.0
  Rb  Rb7  1  0.27  0.27  0.9  1.0
  Rb  Rb8  1  0.9  0.9  0.27  1.0
  Rb  Rb9  1  0.27  0.9  0.27  1.0
  Rb  Rb10  1  0.9  0.27  0.27  1.0
  Rb  Rb11  1  0.27  0.27  0.27  1.0
  As  As0  1  0.0  0.0  0.0  1.0
  O  O1  1  0.58  0.58  0.0  1.0
  O  O2  1  0.58  0.0  0.58  1.0
  O  O3  1  0.0  0.58  0.58  1.0

data_Rb8AsO3
_symmetry_space_group_name_H-M   R3m
_cell_length_a   10.13
_cell_length_b   10.13
_cell_length_c   12.41
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Rb8AsO3
_chemical_formula_sum   'Rb24 As3 O9'
_cell_volume   1102.66
_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  9  0.08  0.54  0.81  1.0
  Rb  Rb1  9  0.21  0.42  0.69  1.0
  Rb  Rb2  3  0.0  0.0  0.27  1.0
  Rb  Rb3  3  0.0  0.0  0.9  1.0
  As  As4  3  0.0  0.0  0.0  1.0
  O  O5  9  0.19  0.39  0.39  1.0

Rb Rb Rb Rb Rb Rb Rb Rb As O O O
Rb Rb Rb Rb Rb Rb Rb Rb As O O O 0 8 + + + 0 1 + o o 0 2 o + o 0 4 o o + 0 9 o o + 0 10 o + o 0 11 + o o 1 8 o + + 1 3 o + o 1 5 o o + 1 9 o o + 1 10 o + o 1 11 o o o 2 8 + o + 2 3 + o o 2 6 o o + 2 9 o o + 2 10 o o o 2 11 + o o 3 8 o o + 3 7 o o + 3 9 o o + 3 10 o o o 3 11 o o o 4 8 + + o 4 5 + o o 4 6 o + o 4 9 o o o 4 10 o + o 4 11 + o o 5 8 o + o 5 7 o + o 5 9 o o o 5 10 o + o 5 11 o o o 6 8 + o o 6 7 + o o 6 9 o o o 6 10 o o o 6 11 + o o 7 9 o o o 7 10 o o o 7 11 o o o 
Rb8AsO3 crystallizes in the trigonal R3m space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a single-bond geometry to one As(1) and three equivalent O(1) atoms. The Rb(1)-As(1) bond length is 1.30 Å. All Rb(1)-O(1) bond lengths are 3.27 Å. In the second Rb site, Rb(2) is bonded in a 3-coordinate geometry to two equivalent Rb(3), one As(1), and two equivalent O(1) atoms. Both Rb(2)-Rb(3) bond lengths are 2.67 Å. The Rb(2)-As(1) bond length is 2.19 Å. Both Rb(2)-O(1) bond lengths are 3.27 Å. In the third Rb site, Rb(3) is bonded in a 5-coordinate geometry to one Rb(4), two equivalent Rb(2), one As(1), and one O(1) atom. The Rb(3)-Rb(4) bond length is 2.67 Å. The Rb(3)-As(1) bond length is 2.82 Å. The Rb(3)-O(1) bond length is 3.27 Å. In the fourth Rb site, Rb(4) is bonded in a 4-coordinate geometry to three equivalent Rb(3) and one As(1) atom. The Rb(4)-As(1) bond length is 3.32 Å. As(1) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(4), three equivalent Rb(2), and three equivalent Rb(3) atoms. O(1) is bonded in a distorted square co-planar geometry to one Rb(1), one Rb(3), and two equivalent Rb(2) atoms.