The material structure described by Rb2Bi2O5 crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a body-centered cubic geometry to eight equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form RbO12 cuboctahedra that share corners with four equivalent Rb(2)O12 cuboctahedra, faces with four equivalent Rb(2)O12 cuboctahedra, and faces with eight equivalent Bi(1)O5 square pyramids. Bi(1) is bonded to one O(2) and four equivalent O(1) atoms to form BiO5 square pyramids that share corners with five equivalent Bi(1)O5 square pyramids and faces with four equivalent Rb(2)O12 cuboctahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Rb(1), two equivalent Rb(2), and two equivalent Bi(1) atoms to form a mixture of distorted corner, edge, and face-sharing ORb4Bi2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the second O site, O(2) is bonded to four equivalent Rb(2) and two equivalent Bi(1) atoms to form a mixture of distorted corner, edge, and face-sharing ORb4Bi2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Bi2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.825
_cell_length_b   4.333
_cell_length_c   4.333
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   165.687
_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  1  0.000  0.000  0.000  1.0
  Rb  Rb1  1  0.500  0.000  0.000  1.0
  Bi  Bi2  1  0.263  0.500  0.500  1.0
  Bi  Bi3  1  0.737  0.500  0.500  1.0
  O  O4  1  0.233  0.500  0.000  1.0
  O  O5  1  0.767  0.500  0.000  1.0
  O  O6  1  0.500  0.500  0.500  1.0
  O  O7  1  0.233  0.000  0.500  1.0
  O  O8  1  0.767  0.000  0.500  1.0
[/CIF]
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The material structure described by Rb2Bi2O5 crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a body-centered cubic geometry to eight equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form RbO12 cuboctahedra that share corners with four equivalent Rb(2)O12 cuboctahedra, faces with four equivalent Rb(2)O12 cuboctahedra, and faces with eight equivalent Bi(1)O5 square pyramids. Bi(1) is bonded to one O(2) and four equivalent O(1) atoms to form BiO5 square pyramids that share corners with five equivalent Bi(1)O5 square pyramids and faces with four equivalent Rb(2)O12 cuboctahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Rb(1), two equivalent Rb(2), and two equivalent Bi(1) atoms to form a mixture of distorted corner, edge, and face-sharing ORb4Bi2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the second O site, O(2) is bonded to four equivalent Rb(2) and two equivalent Bi(1) atoms to form a mixture of distorted corner, edge, and face-sharing ORb4Bi2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2Bi2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.825
_cell_length_b   4.333
_cell_length_c   4.333
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   165.687
_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  1  0.000  0.000  0.000  1.0
  Rb  Rb1  1  0.500  0.000  0.000  1.0
  Bi  Bi2  1  0.263  0.500  0.500  1.0
  Bi  Bi3  1  0.737  0.500  0.500  1.0
  O  O4  1  0.233  0.500  0.000  1.0
  O  O5  1  0.767  0.500  0.000  1.0
  O  O6  1  0.500  0.500  0.500  1.0
  O  O7  1  0.233  0.000  0.500  1.0
  O  O8  1  0.767  0.000  0.500  1.0
[/CIF]
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