The material structure described by Rb2V3O8 crystallizes in the tetragonal P4bm space group. Rb(1) is bonded in a 10-coordinate geometry to one O(3), two equivalent O(1), three equivalent O(4), and four equivalent O(2) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form VO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra and corners with two equivalent V(2)O5 trigonal bipyramids. In the second V site, V(2) is bonded to one O(1) and four equivalent O(2) atoms to form distorted corner-sharing VO5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to four equivalent Rb(1) and one V(2) atom. In the second O site, O(2) is bonded in a distorted linear geometry to two equivalent Rb(1), one V(1), and one V(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1) and two equivalent V(1) atoms. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one V(1) atom. is represented by the CIF file [CIF]
data_Rb2V3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.897
_cell_length_b   8.897
_cell_length_c   5.684
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   449.982
_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  0.167  0.667  0.010  1.0
  Rb  Rb1  1  0.667  0.833  0.010  1.0
  Rb  Rb2  1  0.333  0.167  0.010  1.0
  Rb  Rb3  1  0.833  0.333  0.010  1.0
  V  V4  1  0.365  0.865  0.529  1.0
  V  V5  1  0.865  0.635  0.529  1.0
  V  V6  1  0.135  0.365  0.529  1.0
  V  V7  1  0.635  0.135  0.529  1.0
  V  V8  1  0.500  0.500  0.720  1.0
  V  V9  1  0.000  0.000  0.720  1.0
  O  O10  1  0.500  0.500  0.006  1.0
  O  O11  1  0.000  0.000  0.006  1.0
  O  O12  1  0.807  0.083  0.641  1.0
  O  O13  1  0.193  0.917  0.641  1.0
  O  O14  1  0.917  0.807  0.641  1.0
  O  O15  1  0.083  0.193  0.641  1.0
  O  O16  1  0.417  0.693  0.641  1.0
  O  O17  1  0.693  0.583  0.641  1.0
  O  O18  1  0.307  0.417  0.641  1.0
  O  O19  1  0.583  0.307  0.641  1.0
  O  O20  1  0.500  0.000  0.639  1.0
  O  O21  1  0.000  0.500  0.639  1.0
  O  O22  1  0.633  0.133  0.239  1.0
  O  O23  1  0.367  0.867  0.239  1.0
  O  O24  1  0.867  0.633  0.239  1.0
  O  O25  1  0.133  0.367  0.239  1.0
[/CIF]
.
The material structure described by Rb2V3O8 crystallizes in the tetragonal P4bm space group. Rb(1) is bonded in a 10-coordinate geometry to one O(3), two equivalent O(1), three equivalent O(4), and four equivalent O(2) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(3), one O(4), and two equivalent O(2) atoms to form VO4 tetrahedra that share  a cornercorner with one V(1)O4 tetrahedra and corners with two equivalent V(2)O5 trigonal bipyramids. In the second V site, V(2) is bonded to one O(1) and four equivalent O(2) atoms to form distorted corner-sharing VO5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to four equivalent Rb(1) and one V(2) atom. In the second O site, O(2) is bonded in a distorted linear geometry to two equivalent Rb(1), one V(1), and one V(2) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1) and two equivalent V(1) atoms. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to three equivalent Rb(1) and one V(1) atom. is represented by the CIF file [CIF]
data_Rb2V3O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.897
_cell_length_b   8.897
_cell_length_c   5.684
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   449.982
_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  0.167  0.667  0.010  1.0
  Rb  Rb1  1  0.667  0.833  0.010  1.0
  Rb  Rb2  1  0.333  0.167  0.010  1.0
  Rb  Rb3  1  0.833  0.333  0.010  1.0
  V  V4  1  0.365  0.865  0.529  1.0
  V  V5  1  0.865  0.635  0.529  1.0
  V  V6  1  0.135  0.365  0.529  1.0
  V  V7  1  0.635  0.135  0.529  1.0
  V  V8  1  0.500  0.500  0.720  1.0
  V  V9  1  0.000  0.000  0.720  1.0
  O  O10  1  0.500  0.500  0.006  1.0
  O  O11  1  0.000  0.000  0.006  1.0
  O  O12  1  0.807  0.083  0.641  1.0
  O  O13  1  0.193  0.917  0.641  1.0
  O  O14  1  0.917  0.807  0.641  1.0
  O  O15  1  0.083  0.193  0.641  1.0
  O  O16  1  0.417  0.693  0.641  1.0
  O  O17  1  0.693  0.583  0.641  1.0
  O  O18  1  0.307  0.417  0.641  1.0
  O  O19  1  0.583  0.307  0.641  1.0
  O  O20  1  0.500  0.000  0.639  1.0
  O  O21  1  0.000  0.500  0.639  1.0
  O  O22  1  0.633  0.133  0.239  1.0
  O  O23  1  0.367  0.867  0.239  1.0
  O  O24  1  0.867  0.633  0.239  1.0
  O  O25  1  0.133  0.367  0.239  1.0
[/CIF]
.