The compound described by Cs2V4O9 crystallizes in the tetragonal P4_2/m space group. Cs(1) is bonded in a 10-coordinate geometry to two equivalent O(2) and eight equivalent O(1) atoms. V(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), and three equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to four equivalent Cs(1) and one V(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Cs(1) and three equivalent V(1) atoms. In the third O site, O(3) is bonded in a distorted trigonal pyramidal geometry to four equivalent V(1) atoms. is represented by the CIF file [CIF]
data_Cs2V4O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.732
_cell_length_b   5.732
_cell_length_c   15.272
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   501.702
_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
  Cs  Cs0  1  0.730  0.748  0.500  1.0
  Cs  Cs1  1  0.748  0.270  0.000  1.0
  Cs  Cs2  1  0.270  0.252  0.500  1.0
  Cs  Cs3  1  0.252  0.730  0.000  1.0
  V  V4  1  0.288  0.147  0.798  1.0
  V  V5  1  0.147  0.712  0.702  1.0
  V  V6  1  0.712  0.853  0.798  1.0
  V  V7  1  0.288  0.147  0.202  1.0
  V  V8  1  0.147  0.712  0.298  1.0
  V  V9  1  0.853  0.288  0.298  1.0
  V  V10  1  0.853  0.288  0.702  1.0
  V  V11  1  0.712  0.853  0.202  1.0
  O  O12  1  0.767  0.777  0.900  1.0
  O  O13  1  0.777  0.233  0.600  1.0
  O  O14  1  0.223  0.767  0.600  1.0
  O  O15  1  0.181  0.380  0.284  1.0
  O  O16  1  0.620  0.181  0.216  1.0
  O  O17  1  0.777  0.233  0.400  1.0
  O  O18  1  0.819  0.620  0.716  1.0
  O  O19  1  0.233  0.223  0.900  1.0
  O  O20  1  0.380  0.819  0.216  1.0
  O  O21  1  0.233  0.223  0.100  1.0
  O  O22  1  0.380  0.819  0.784  1.0
  O  O23  1  0.181  0.380  0.716  1.0
  O  O24  1  0.000  0.000  0.750  1.0
  O  O25  1  0.620  0.181  0.784  1.0
  O  O26  1  0.767  0.777  0.100  1.0
  O  O27  1  0.819  0.620  0.284  1.0
  O  O28  1  0.223  0.767  0.400  1.0
  O  O29  1  1.000  0.000  0.250  1.0
[/CIF]
.
The compound described by Cs2V4O9 crystallizes in the tetragonal P4_2/m space group. Cs(1) is bonded in a 10-coordinate geometry to two equivalent O(2) and eight equivalent O(1) atoms. V(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), and three equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to four equivalent Cs(1) and one V(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Cs(1) and three equivalent V(1) atoms. In the third O site, O(3) is bonded in a distorted trigonal pyramidal geometry to four equivalent V(1) atoms. is represented by the CIF file [CIF]
data_Cs2V4O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.732
_cell_length_b   5.732
_cell_length_c   15.272
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   501.702
_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
  Cs  Cs0  1  0.730  0.748  0.500  1.0
  Cs  Cs1  1  0.748  0.270  0.000  1.0
  Cs  Cs2  1  0.270  0.252  0.500  1.0
  Cs  Cs3  1  0.252  0.730  0.000  1.0
  V  V4  1  0.288  0.147  0.798  1.0
  V  V5  1  0.147  0.712  0.702  1.0
  V  V6  1  0.712  0.853  0.798  1.0
  V  V7  1  0.288  0.147  0.202  1.0
  V  V8  1  0.147  0.712  0.298  1.0
  V  V9  1  0.853  0.288  0.298  1.0
  V  V10  1  0.853  0.288  0.702  1.0
  V  V11  1  0.712  0.853  0.202  1.0
  O  O12  1  0.767  0.777  0.900  1.0
  O  O13  1  0.777  0.233  0.600  1.0
  O  O14  1  0.223  0.767  0.600  1.0
  O  O15  1  0.181  0.380  0.284  1.0
  O  O16  1  0.620  0.181  0.216  1.0
  O  O17  1  0.777  0.233  0.400  1.0
  O  O18  1  0.819  0.620  0.716  1.0
  O  O19  1  0.233  0.223  0.900  1.0
  O  O20  1  0.380  0.819  0.216  1.0
  O  O21  1  0.233  0.223  0.100  1.0
  O  O22  1  0.380  0.819  0.784  1.0
  O  O23  1  0.181  0.380  0.716  1.0
  O  O24  1  0.000  0.000  0.750  1.0
  O  O25  1  0.620  0.181  0.784  1.0
  O  O26  1  0.767  0.777  0.100  1.0
  O  O27  1  0.819  0.620  0.284  1.0
  O  O28  1  0.223  0.767  0.400  1.0
  O  O29  1  1.000  0.000  0.250  1.0
[/CIF]
.