The crystal structure described by Rb4V2O9 crystallizes in the triclinic P-1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. V(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing VO4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to two equivalent Rb(1), two equivalent Rb(2), and two equivalent V(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Rb(1), two equivalent Rb(2), and one V(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Rb(1), two equivalent Rb(2), and one V(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one V(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Rb(1) and two equivalent Rb(2) atoms. is represented by the CIF card [CIF]
data_Rb4V2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.525
_cell_length_b   7.017
_cell_length_c   7.382
_cell_angle_alpha   108.910
_cell_angle_beta   100.681
_cell_angle_gamma   95.880
_symmetry_Int_Tables_number   1
_cell_volume   309.357
_cell_formula_units_Z   1
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  0.695  0.576  0.860  1.0
  Rb  Rb1  1  0.305  0.424  0.140  1.0
  Rb  Rb2  1  0.246  0.892  0.655  1.0
  Rb  Rb3  1  0.754  0.108  0.345  1.0
  V  V4  1  0.812  0.085  0.836  1.0
  V  V5  1  0.188  0.915  0.164  1.0
  O  O6  1  0.000  0.000  0.000  1.0
  O  O7  1  0.629  0.198  0.950  1.0
  O  O8  1  0.371  0.802  0.050  1.0
  O  O9  1  0.952  0.255  0.764  1.0
  O  O10  1  0.048  0.745  0.236  1.0
  O  O11  1  0.679  0.872  0.631  1.0
  O  O12  1  0.321  0.128  0.369  1.0
  O  O13  1  0.253  0.394  0.586  1.0
  O  O14  1  0.747  0.606  0.414  1.0
[/CIF]
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The crystal structure described by Rb4V2O9 crystallizes in the triclinic P-1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. V(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form corner-sharing VO4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to two equivalent Rb(1), two equivalent Rb(2), and two equivalent V(1) atoms. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Rb(1), two equivalent Rb(2), and one V(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Rb(1), two equivalent Rb(2), and one V(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one V(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Rb(1) and two equivalent Rb(2) atoms. is represented by the CIF card [CIF]
data_Rb4V2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.525
_cell_length_b   7.017
_cell_length_c   7.382
_cell_angle_alpha   108.910
_cell_angle_beta   100.681
_cell_angle_gamma   95.880
_symmetry_Int_Tables_number   1
_cell_volume   309.357
_cell_formula_units_Z   1
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  0.695  0.576  0.860  1.0
  Rb  Rb1  1  0.305  0.424  0.140  1.0
  Rb  Rb2  1  0.246  0.892  0.655  1.0
  Rb  Rb3  1  0.754  0.108  0.345  1.0
  V  V4  1  0.812  0.085  0.836  1.0
  V  V5  1  0.188  0.915  0.164  1.0
  O  O6  1  0.000  0.000  0.000  1.0
  O  O7  1  0.629  0.198  0.950  1.0
  O  O8  1  0.371  0.802  0.050  1.0
  O  O9  1  0.952  0.255  0.764  1.0
  O  O10  1  0.048  0.745  0.236  1.0
  O  O11  1  0.679  0.872  0.631  1.0
  O  O12  1  0.321  0.128  0.369  1.0
  O  O13  1  0.253  0.394  0.586  1.0
  O  O14  1  0.747  0.606  0.414  1.0
[/CIF]
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