The material structure described by Rb2U2O7 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded to three equivalent O(1) and three equivalent O(3) atoms to form RbO6 octahedra that share corners with six equivalent U(1)O6 octahedra and edges with six equivalent Rb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-57°. U(1) is bonded to one O(1), one O(3), one O(4), and three equivalent O(2) atoms to form UO6 octahedra that share corners with five equivalent U(1)O6 octahedra, corners with six equivalent Rb(1)O6 octahedra, and  an edgeedge with one U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-57°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Rb(1) and one U(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent U(1) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Rb(1) and one U(1) atom. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent U(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2U2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.029
_cell_length_b   6.968
_cell_length_c   7.408
_cell_angle_alpha   71.462
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   393.000
_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  0.120  0.772  0.493  1.0
  Rb  Rb1  1  0.380  0.272  0.493  1.0
  Rb  Rb2  1  0.620  0.728  0.507  1.0
  Rb  Rb3  1  0.880  0.228  0.507  1.0
  U  U4  1  0.622  0.223  0.006  1.0
  U  U5  1  0.122  0.277  0.994  1.0
  U  U6  1  0.378  0.777  0.994  1.0
  U  U7  1  0.878  0.723  0.006  1.0
  O  O8  1  0.879  0.634  0.272  1.0
  O  O9  1  0.621  0.134  0.272  1.0
  O  O10  1  0.639  0.892  0.013  1.0
  O  O11  1  0.379  0.866  0.728  1.0
  O  O12  1  0.635  0.310  0.740  1.0
  O  O13  1  0.139  0.608  0.987  1.0
  O  O14  1  0.135  0.190  0.260  1.0
  O  O15  1  0.861  0.392  0.013  1.0
  O  O16  1  0.865  0.810  0.740  1.0
  O  O17  1  0.365  0.690  0.260  1.0
  O  O18  1  0.361  0.108  0.987  1.0
  O  O19  1  0.500  0.500  0.000  1.0
  O  O20  1  0.121  0.366  0.728  1.0
  O  O21  1  0.000  0.000  0.000  1.0
[/CIF]
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The material structure described by Rb2U2O7 crystallizes in the monoclinic P2_1/c space group. Rb(1) is bonded to three equivalent O(1) and three equivalent O(3) atoms to form RbO6 octahedra that share corners with six equivalent U(1)O6 octahedra and edges with six equivalent Rb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-57°. U(1) is bonded to one O(1), one O(3), one O(4), and three equivalent O(2) atoms to form UO6 octahedra that share corners with five equivalent U(1)O6 octahedra, corners with six equivalent Rb(1)O6 octahedra, and  an edgeedge with one U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-57°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Rb(1) and one U(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to three equivalent U(1) atoms. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to three equivalent Rb(1) and one U(1) atom. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent U(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2U2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.029
_cell_length_b   6.968
_cell_length_c   7.408
_cell_angle_alpha   71.462
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   393.000
_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  0.120  0.772  0.493  1.0
  Rb  Rb1  1  0.380  0.272  0.493  1.0
  Rb  Rb2  1  0.620  0.728  0.507  1.0
  Rb  Rb3  1  0.880  0.228  0.507  1.0
  U  U4  1  0.622  0.223  0.006  1.0
  U  U5  1  0.122  0.277  0.994  1.0
  U  U6  1  0.378  0.777  0.994  1.0
  U  U7  1  0.878  0.723  0.006  1.0
  O  O8  1  0.879  0.634  0.272  1.0
  O  O9  1  0.621  0.134  0.272  1.0
  O  O10  1  0.639  0.892  0.013  1.0
  O  O11  1  0.379  0.866  0.728  1.0
  O  O12  1  0.635  0.310  0.740  1.0
  O  O13  1  0.139  0.608  0.987  1.0
  O  O14  1  0.135  0.190  0.260  1.0
  O  O15  1  0.861  0.392  0.013  1.0
  O  O16  1  0.865  0.810  0.740  1.0
  O  O17  1  0.365  0.690  0.260  1.0
  O  O18  1  0.361  0.108  0.987  1.0
  O  O19  1  0.500  0.500  0.000  1.0
  O  O20  1  0.121  0.366  0.728  1.0
  O  O21  1  0.000  0.000  0.000  1.0
[/CIF]
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