The crystal structure described by Rb2W2O5 crystallizes in the orthorhombic Ima2 space group. Rb(1) is bonded in a 9-coordinate geometry to one O(3), four equivalent O(1), and four equivalent O(2) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form WO6 octahedra that share corners with four equivalent W(1)O6 octahedra and corners with two equivalent W(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 5°. In the second W site, W(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form WO4 tetrahedra that share corners with two equivalent W(1)O6 octahedra and corners with two equivalent W(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 19°. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Rb(1) and two equivalent W(1) atoms to form ORb4W2 octahedra that share corners with two equivalent O(1)Rb4W2 octahedra, corners with four equivalent O(3)Rb2W2 tetrahedra, edges with two equivalent O(1)Rb4W2 octahedra, and faces with four equivalent O(1)Rb4W2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second O site, O(2) is bonded in a 6-coordinate geometry to four equivalent Rb(1), one W(1), and one W(2) atom. In the third O site, O(3) is bonded to two equivalent Rb(1) and two equivalent W(2) atoms to form distorted ORb2W2 tetrahedra that share corners with eight equivalent O(1)Rb4W2 octahedra and corners with two equivalent O(3)Rb2W2 tetrahedra. The corner-sharing octahedral tilt angles range from 13-86°. is represented by the CIF file [CIF]
data_Rb2W2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.248
_cell_length_b   9.248
_cell_length_c   9.248
_cell_angle_alpha   142.036
_cell_angle_beta   141.972
_cell_angle_gamma   54.823
_symmetry_Int_Tables_number   1
_cell_volume   297.652
_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  0.906  0.387  0.516  1.0
  Rb  Rb1  1  0.094  0.610  0.480  1.0
  Rb  Rb2  1  0.371  0.887  0.480  1.0
  Rb  Rb3  1  0.629  0.110  0.516  1.0
  W  W4  1  0.000  0.012  0.012  1.0
  W  W5  1  0.500  0.512  0.012  1.0
  W  W6  1  0.687  0.708  0.895  1.0
  W  W7  1  0.313  0.208  0.021  1.0
  O  O8  1  0.257  0.263  0.508  1.0
  O  O9  1  0.743  0.252  0.006  1.0
  O  O10  1  0.254  0.763  0.006  1.0
  O  O11  1  0.746  0.752  0.508  1.0
  O  O12  1  0.884  0.876  0.029  1.0
  O  O13  1  0.116  0.145  0.992  1.0
  O  O14  1  0.347  0.376  0.992  1.0
  O  O15  1  0.653  0.645  0.029  1.0
  O  O16  1  0.580  0.412  0.492  1.0
  O  O17  1  0.420  0.912  0.832  1.0
[/CIF]
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The crystal structure described by Rb2W2O5 crystallizes in the orthorhombic Ima2 space group. Rb(1) is bonded in a 9-coordinate geometry to one O(3), four equivalent O(1), and four equivalent O(2) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form WO6 octahedra that share corners with four equivalent W(1)O6 octahedra and corners with two equivalent W(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 5°. In the second W site, W(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form WO4 tetrahedra that share corners with two equivalent W(1)O6 octahedra and corners with two equivalent W(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 19°. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Rb(1) and two equivalent W(1) atoms to form ORb4W2 octahedra that share corners with two equivalent O(1)Rb4W2 octahedra, corners with four equivalent O(3)Rb2W2 tetrahedra, edges with two equivalent O(1)Rb4W2 octahedra, and faces with four equivalent O(1)Rb4W2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second O site, O(2) is bonded in a 6-coordinate geometry to four equivalent Rb(1), one W(1), and one W(2) atom. In the third O site, O(3) is bonded to two equivalent Rb(1) and two equivalent W(2) atoms to form distorted ORb2W2 tetrahedra that share corners with eight equivalent O(1)Rb4W2 octahedra and corners with two equivalent O(3)Rb2W2 tetrahedra. The corner-sharing octahedral tilt angles range from 13-86°. is represented by the CIF file [CIF]
data_Rb2W2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.248
_cell_length_b   9.248
_cell_length_c   9.248
_cell_angle_alpha   142.036
_cell_angle_beta   141.972
_cell_angle_gamma   54.823
_symmetry_Int_Tables_number   1
_cell_volume   297.652
_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  0.906  0.387  0.516  1.0
  Rb  Rb1  1  0.094  0.610  0.480  1.0
  Rb  Rb2  1  0.371  0.887  0.480  1.0
  Rb  Rb3  1  0.629  0.110  0.516  1.0
  W  W4  1  0.000  0.012  0.012  1.0
  W  W5  1  0.500  0.512  0.012  1.0
  W  W6  1  0.687  0.708  0.895  1.0
  W  W7  1  0.313  0.208  0.021  1.0
  O  O8  1  0.257  0.263  0.508  1.0
  O  O9  1  0.743  0.252  0.006  1.0
  O  O10  1  0.254  0.763  0.006  1.0
  O  O11  1  0.746  0.752  0.508  1.0
  O  O12  1  0.884  0.876  0.029  1.0
  O  O13  1  0.116  0.145  0.992  1.0
  O  O14  1  0.347  0.376  0.992  1.0
  O  O15  1  0.653  0.645  0.029  1.0
  O  O16  1  0.580  0.412  0.492  1.0
  O  O17  1  0.420  0.912  0.832  1.0
[/CIF]
.