The material described by Rb2W2O7 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. W(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to four equivalent Rb(1) and one W(1) atom. In the second O site, O(2) is bonded to two equivalent Rb(1) and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing ORb2W2 tetrahedra. In the third O site, O(3) is bonded in a linear geometry to two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a distorted linear geometry to two equivalent W(1) atoms. is represented by the CIF file [CIF]
data_Rb2W2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.938
_cell_length_b   6.088
_cell_length_c   14.209
_cell_angle_alpha   90.000
_cell_angle_beta   89.999
_cell_angle_gamma   90.408
_symmetry_Int_Tables_number   1
_cell_volume   340.700
_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  0.010  0.831  0.172  1.0
  Rb  Rb1  1  0.990  0.669  0.672  1.0
  Rb  Rb2  1  0.990  0.169  0.828  1.0
  Rb  Rb3  1  0.010  0.331  0.328  1.0
  W  W4  1  0.448  0.216  0.562  1.0
  W  W5  1  0.552  0.284  0.062  1.0
  W  W6  1  0.552  0.784  0.438  1.0
  W  W7  1  0.448  0.716  0.938  1.0
  O  O8  1  0.495  0.805  0.820  1.0
  O  O9  1  0.505  0.695  0.320  1.0
  O  O10  1  0.505  0.195  0.180  1.0
  O  O11  1  0.495  0.305  0.680  1.0
  O  O12  1  0.505  0.587  0.078  1.0
  O  O13  1  0.495  0.913  0.578  1.0
  O  O14  1  0.495  0.413  0.922  1.0
  O  O15  1  0.505  0.087  0.422  1.0
  O  O16  1  0.500  0.500  0.500  1.0
  O  O17  1  0.500  1.000  0.000  1.0
  O  O18  1  0.990  0.223  0.553  1.0
  O  O19  1  0.990  0.723  0.947  1.0
  O  O20  1  0.010  0.777  0.447  1.0
  O  O21  1  0.010  0.277  0.053  1.0
[/CIF]
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The material described by Rb2W2O7 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. W(1) is bonded to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms to form a mixture of distorted corner and edge-sharing WO6 octahedra. The corner-sharing octahedral tilt angles range from 0-8°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to four equivalent Rb(1) and one W(1) atom. In the second O site, O(2) is bonded to two equivalent Rb(1) and two equivalent W(1) atoms to form a mixture of distorted corner and edge-sharing ORb2W2 tetrahedra. In the third O site, O(3) is bonded in a linear geometry to two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a distorted linear geometry to two equivalent W(1) atoms. is represented by the CIF file [CIF]
data_Rb2W2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.938
_cell_length_b   6.088
_cell_length_c   14.209
_cell_angle_alpha   90.000
_cell_angle_beta   89.999
_cell_angle_gamma   90.408
_symmetry_Int_Tables_number   1
_cell_volume   340.700
_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  0.010  0.831  0.172  1.0
  Rb  Rb1  1  0.990  0.669  0.672  1.0
  Rb  Rb2  1  0.990  0.169  0.828  1.0
  Rb  Rb3  1  0.010  0.331  0.328  1.0
  W  W4  1  0.448  0.216  0.562  1.0
  W  W5  1  0.552  0.284  0.062  1.0
  W  W6  1  0.552  0.784  0.438  1.0
  W  W7  1  0.448  0.716  0.938  1.0
  O  O8  1  0.495  0.805  0.820  1.0
  O  O9  1  0.505  0.695  0.320  1.0
  O  O10  1  0.505  0.195  0.180  1.0
  O  O11  1  0.495  0.305  0.680  1.0
  O  O12  1  0.505  0.587  0.078  1.0
  O  O13  1  0.495  0.913  0.578  1.0
  O  O14  1  0.495  0.413  0.922  1.0
  O  O15  1  0.505  0.087  0.422  1.0
  O  O16  1  0.500  0.500  0.500  1.0
  O  O17  1  0.500  1.000  0.000  1.0
  O  O18  1  0.990  0.223  0.553  1.0
  O  O19  1  0.990  0.723  0.947  1.0
  O  O20  1  0.010  0.777  0.447  1.0
  O  O21  1  0.010  0.277  0.053  1.0
[/CIF]
.