The material described by Rb2Mo2O5 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 Mo sites. In the first Mo site, Mo(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MoO6 octahedra that share corners with four equivalent Mo(1)O6 octahedra and corners with two equivalent Mo(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 6°. In the second Mo site, Mo(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form MoO4 tetrahedra that share corners with two equivalent Mo(1)O6 octahedra and corners with two equivalent Mo(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 22°. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Rb(1) and two equivalent Mo(1) atoms to form distorted ORb4Mo2 octahedra that share corners with two equivalent O(1)Rb4Mo2 octahedra, corners with four equivalent O(3)Rb2Mo2 tetrahedra, edges with two equivalent O(1)Rb4Mo2 octahedra, and faces with four equivalent O(1)Rb4Mo2 octahedra. The corner-sharing octahedral tilt angles are 2°. In the second O site, O(2) is bonded in a 6-coordinate geometry to four equivalent Rb(1), one Mo(1), and one Mo(2) atom. In the third O site, O(3) is bonded to two equivalent Rb(1) and two equivalent Mo(2) atoms to form distorted ORb2Mo2 tetrahedra that share corners with eight equivalent O(1)Rb4Mo2 octahedra and corners with two equivalent O(3)Rb2Mo2 tetrahedra. The corner-sharing octahedral tilt angles range from 14-86°. is represented by the CIF file [CIF]
data_Rb2Mo2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.191
_cell_length_b   9.191
_cell_length_c   9.191
_cell_angle_alpha   142.030
_cell_angle_beta   141.566
_cell_angle_gamma   55.134
_symmetry_Int_Tables_number   1
_cell_volume   294.817
_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  0.905  0.388  0.517  1.0
  Rb  Rb1  1  0.095  0.611  0.483  1.0
  Rb  Rb2  1  0.371  0.888  0.483  1.0
  Rb  Rb3  1  0.629  0.111  0.517  1.0
  Mo  Mo4  1  0.000  0.016  0.016  1.0
  Mo  Mo5  1  0.500  0.516  0.016  1.0
  Mo  Mo6  1  0.685  0.708  0.893  1.0
  Mo  Mo7  1  0.315  0.208  0.023  1.0
  O  O8  1  0.255  0.260  0.503  1.0
  O  O9  1  0.745  0.248  0.006  1.0
  O  O10  1  0.257  0.760  0.006  1.0
  O  O11  1  0.743  0.748  0.503  1.0
  O  O12  1  0.889  0.874  0.036  1.0
  O  O13  1  0.111  0.147  0.985  1.0
  O  O14  1  0.338  0.374  0.985  1.0
  O  O15  1  0.662  0.647  0.036  1.0
  O  O16  1  0.580  0.411  0.491  1.0
  O  O17  1  0.420  0.911  0.831  1.0
[/CIF]
.
The material described by Rb2Mo2O5 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 Mo sites. In the first Mo site, Mo(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MoO6 octahedra that share corners with four equivalent Mo(1)O6 octahedra and corners with two equivalent Mo(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 6°. In the second Mo site, Mo(2) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form MoO4 tetrahedra that share corners with two equivalent Mo(1)O6 octahedra and corners with two equivalent Mo(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 22°. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Rb(1) and two equivalent Mo(1) atoms to form distorted ORb4Mo2 octahedra that share corners with two equivalent O(1)Rb4Mo2 octahedra, corners with four equivalent O(3)Rb2Mo2 tetrahedra, edges with two equivalent O(1)Rb4Mo2 octahedra, and faces with four equivalent O(1)Rb4Mo2 octahedra. The corner-sharing octahedral tilt angles are 2°. In the second O site, O(2) is bonded in a 6-coordinate geometry to four equivalent Rb(1), one Mo(1), and one Mo(2) atom. In the third O site, O(3) is bonded to two equivalent Rb(1) and two equivalent Mo(2) atoms to form distorted ORb2Mo2 tetrahedra that share corners with eight equivalent O(1)Rb4Mo2 octahedra and corners with two equivalent O(3)Rb2Mo2 tetrahedra. The corner-sharing octahedral tilt angles range from 14-86°. is represented by the CIF file [CIF]
data_Rb2Mo2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.191
_cell_length_b   9.191
_cell_length_c   9.191
_cell_angle_alpha   142.030
_cell_angle_beta   141.566
_cell_angle_gamma   55.134
_symmetry_Int_Tables_number   1
_cell_volume   294.817
_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  0.905  0.388  0.517  1.0
  Rb  Rb1  1  0.095  0.611  0.483  1.0
  Rb  Rb2  1  0.371  0.888  0.483  1.0
  Rb  Rb3  1  0.629  0.111  0.517  1.0
  Mo  Mo4  1  0.000  0.016  0.016  1.0
  Mo  Mo5  1  0.500  0.516  0.016  1.0
  Mo  Mo6  1  0.685  0.708  0.893  1.0
  Mo  Mo7  1  0.315  0.208  0.023  1.0
  O  O8  1  0.255  0.260  0.503  1.0
  O  O9  1  0.745  0.248  0.006  1.0
  O  O10  1  0.257  0.760  0.006  1.0
  O  O11  1  0.743  0.748  0.503  1.0
  O  O12  1  0.889  0.874  0.036  1.0
  O  O13  1  0.111  0.147  0.985  1.0
  O  O14  1  0.338  0.374  0.985  1.0
  O  O15  1  0.662  0.647  0.036  1.0
  O  O16  1  0.580  0.411  0.491  1.0
  O  O17  1  0.420  0.911  0.831  1.0
[/CIF]
.